It should be CJ, also known as Carl Johnson, a brother of Sweet who is the boss of the gang known as Grove Street, which is based in Ganton.
Franklin, I guess. Trevor and Michael could work out as a secondary line. This would only make game worse, however
Especially for GTA V, CJ for sure. He is a surprise egg, with the motivation he did literally everything and can be dragged to any kind of story.
He did stuff like gang shit, racing cars, running a garage, RUNNING A CASINO, PUTTING A HEIST OVER ANOTHER CASINO, BEING A RAPPER'S MANAGER AND WORKING FOR DEEP FUCKING STATE THEN RAIDING AREA 51 AND STEALING FROM THE DEEP STATE HOLY FUCK CJ WHAT ARE YOU?!?!?!??!?!
But the best character in all GTA games is Tommy Vercetti, he is just not fit for GTA V's concept.
gta V with 3 main character is dogshit game
also rockstar dogshit too
rockstar doesnt even care gta online, fulled by bunch of modders. shit game
On the one hand Trevor since he could get into all kinds of crazy shit, but expanding on Michael's story could be interesting.
So Trevor would probably have the most fun missions but Michael might be better for storytelling.
Michael is the main character, trevor and franklin made it just better
Michael since he is the only semi decent character in that game