Company of Heroes 1
edit: also StarCraft 2 has biggest community and is arguably the game with the team most dedicated to balance
Dont know about current sc2 but First year of hots balance was awful. And they didnt do anything. There were build order loses to smth like 10pool - total coinflip. Is there a BO loses now?
I kind of dislike that they made so few changes to hots and sell it as a new game.
I preffer chess, to all games. But there are cheaters. Sometimes they cheat only in the critical positions, while making all other moves themselves.