My turn.
All Primes, and all Convoys.
Note that
Italicized Convoys are ones that were NOT Primes in the English versions.
And that this list only contains leaders who are specifically Primes/Convoys, excluding any leaders who weren't Primes/Convoys.
And those with "**" represent different-named versions of the same guy directly above them.
Generation 1-2 Marvel Comics:
* Prima
* Prime Nova
* Sentinel Prime
* Optimus Prime
* Rodimus Prime (various alternate future timelines)
* Modus Prime (Classics splinter timeline)
Generation 1 cartoon:
* "Ancient Robot" (retroactively, and retroactively named "Primon, the Aplha Prime")
* "Powerful Robot" (retroactively, and retroactively named "Prima")
* "Brooding Robot" (retroactively, and retroactively named "Prime Nova A.K.A. Nove Prime")
* "Pre-Transformer" (retroactively, and retroactively named "Guardian Prime")
* "New Narrator" (retroactively, and retroactively named "Zeta Prime")
* "U-Haul Robot" (retroactiely, and retroactively named "Sentinel Prime")
* Optimus Prime
** Powermaster Optimus Prime
* Rodimus Prime
Japanese Generation 1 cartoons and related media:
* Convoy
** Star Convoy
** Super Convoy (Nucleon Quest)
** Convoy (G-2)
** Battle Convoy
** G1 Convoy Black Version
* Rodimus Convoy
* Fire Convoy
** Super Fire Convoy
** God Fire Convoy
*
Black Convoy* Reverse Convoy
* Convoy (Kiss Players)
* Nise Convoy
* Pepsi Convoy
* Black Rodimus Convoy
Beast Era cartoons and related media* Optimus Prime
* Primon
* Prima
* Prime Nova
* Sentinel Prime
* Rodimus Prime
* Primal Prime
* Lio Convoy
** Leo Prime
* Big Convoy
* "Joe Convoy" (false name)
Japanese Beast Era:
*
Convoy**
Convobat**
Burning Convoy**
Metals Convoy**
Powered Convoy**
Convoy (Beast Wars Returns)
**
Beast Convoy**
Burning Beast Convoy* Lio Convoy
** Great Lio Convoy
** Leo Prime
* Black Lio Convoy
* Big Convoy
* Black Big Convoy
* Great Convoy
* Unnamed Convoy Council member
* Unnamed Convoy Council member
* Crow Convoy
* Break (BW Neo manga, after earning the rank in the final chapter)
* Cohrada (BW Neo manga, after earning the rank in the final chapter)
* Longrack (BW Neo manga, after earning the rank in the final chapter)
* Stampy (BW Neo manga, after earning the rank in the final chapter)
* Many of Longrack's ancestors (BW Neo manga)
* Star Upper (claimed to hold the rank of "Hyper Convoy Brilliant Special 98", twas a lie)
* Logos Prime
Robots in Disguise:
* Optimus Prime
** Omega Prime
Generation 1 Dreamwave comics:
* Alpha Prime
* Guardian Prime
* Sentinel Prime
* Optimus Prime
* Rodimus Prime (strangely)
Unicron Trilogy:
* Optimus Prime
** Jet Convoy/Jet Optimus/Jet Prime (the combined form of Optimus and Jetfire)
** The combined form of Optimus and Overload
** The combined form of the above two combined forms
** The combined forms of Optimus and Wing Saber (Energon)
** Optimus Supreme
** Optimus Prime Savage Claw Mode
** Optimus Prime Sonic Wing Mode
* Nemesis Prime
* Vector Prime
Micron Trilogy:
* Convoy
** Jet Convoy
** Magna Convoy
** Magna Jet Convoy
** Convoy Final Battle Coloration
** Grand Convoy
** Wing Convoy
** Omega Convoy
**/* Galaxy Convoy (debatable if he's the same guy as the above or not)
** Liger Convoy
** Sonic Convoy
*
Prime (Armada Sparkplug's Japanese name)
*
Rodimus Convoy* Vector Prime
*
Nitro Convoy*
Flame Convoy*
Live Convoy*
Megalo ConvoyUniverse (2003):
* Nemesis Prime
* Spychanger Optimus Prime
Alternators:
* Nemesis Prime
Binaltech and Alternity:
* Convoy
** Convoy Ultimate Silver
* Convoy Vibrant Red
* Convoy Super Black
Masterpiece:
* Convoy
* Rodimus Convoy
* Black Convoy
* Black Rodimus Convoy
Generation 1 Devil's Due "G.I. Joe vs. the Transformers" comics:
* Optimus Prime
* Serpentor Prime
Generation 1 IDW comics:
* Unknown
* Unknown
* Nova Prime
** Nemesis Prime
* Nominus Prime
* Sentinel Prime
* Zeta Prime
* Optimus Prime
* "Rodimus Prime" (not official, just a temporary nickname)
Movieverse:
* The Fallen
* Prima
* 5 or 11 other Primes
* Sentinel Prime
* Optimus Prime
* Bendy-Bus Prime
* Darkside Optimus Prime
* Nemesis Prime
Animated:
* Ultra Prime (former, promoted to "Ultra Magnus")
* Fire Prime
* Big Bang Prime
* Override Prime
* Rodimus Prime
* Sentinel Prime (former, promoted to "Sentinel Magnus")
* Longarm Prime
* Optimus Prime
** Wingblade Optimus Prime
* "Beeimus Prime" (false name)
* Nemesis Prime
* Shattered Glass Optimus Prime
Universe (2008):
* Nemesis Prime
TransTech:
* Optimus Prime
Shattered Glass:
* Optimus Prime
* Rodimus Prime (self-appointed)
Henkei! Henkei!:
* Convoy
United:
* Optimus Prime
** Optimus Prime Cybertron Mode
** Laser Optimus Prime
** Black Optimus Prime
* Rodimus Prime
* Darkside Optimus Prime
Original Thirteen Primes (Multiverse):
* Prima
* The Fallen
* Vector Prime
* Nexus Prime
* Logos Prime
** Soundblaster
* Eight others
Original Thirteen Primes (Aligned):
* Prima
* Vector Prime
* Alpha Trion
* Solus Prime
* Micronus Prime
* Alchemist Prime
* Nexus Prime
* Onyx Prime
* Amalgamous Prime
* Quintus Prime
* Liege Maximo
* Megatronus
** The Fallen
* "
Thirteen"
Optimus Prime Aligned Continuity:
* The above Aligned Thirteen
* Sentinel Zeta Prime
* Optimus Prime
* "Nemesis Prime" (a non-living, man-made, remote-controlled robot doppelganger of Optimus)
Japanese version of the Aligned continuity* Optimus Prime
** Shining Optimus Prime
** Dark Guard Optimus Prime
** The combined form of Optimus and Gaia Unicron
** Hunter Optimus Prime
** Optimus ExPrime
* "Nemesis Prime" (the same man-made doppelganger from the English version)
** The combined form of Nemesis Prime and Nightmare Unicron (debatable since Nemesis isn't actually his own person)
* Leo Prime (same guy as the Japanese Beast Era character)
* Go Prime
* Hunter Nemesis Prime
The Cybertron Satellite Town Commanders:
* Akiba Prime
* Fukutsu Prime
* Ginza Prime
* Ikebukuro Prime
* Itami Prime
* Kawasaki Prime
* Mito Prime
* Nagoya Prime
* Saitama Prime
* Sapporo Prime
* Sendai Prime
* Tachikawa Prime
* Umeda Prime
* Yokohama Prime
* Daimicron Prime
* Hakata Prime
* Hiroshima Prime
* Ishinomaki Prime
* Yūrakuchō Prime
Kre-O:
* Optimus Prime
* Sentinel Prime
* Nemesis Prime
Bot Shots:
* Optimus Prime
* Sentinel Prime
* Nemesis Prime
Cap Bots:
* Captimus Prime
GT:
* GT-R Prime
* Safety Prime
Transformers × Evangelion* Convoy
** Convoy Mode "EVA"
IDW "Transformers vs. G.I. Joe" comics:
* Optimus Prime
Transformers Cloud:
* Optimus Prime
Angry Bird Transformers:
* Optimus Prime
* Sentinel Prime
And... I think that's it (without just further deviations of the same characters from more obscure mediums like the G1 books, the Beast Era manga, the Galaxy Force manga, etc.).