Depends on if you still want to be melee or if you're willing to be either ranged or caster DPS.

If melee, Dragoon has positionals, but they're not as erratic as those of Monk, while Ninja has less on positionals, but a lot more things going on like Ninki and Ninjutsu.

If ranged, Bard would probably be right up your alley, while Machinist has issues with both timing, button bashing and general RNG woes.

If caster, Red Mage is around the same level of simplicity as Samurai, Summoner has a couple of timers but aren't as major as GL stacks, and Black Mage kinda has the worst of both worlds.