Out of every DPS I've tried (a lot tbh), they all need to learn the fight at some degree or you'll be spending cooldowns before jumps etc, so I think you better play a crafter, because every class requires memorization of the fight:
For tanks you'll need to save certain CDs for specific mechanics; for healers you'll need some preemptive heals for the whole fight (casting heal AFTER the dmg is done will get someone killed most of the times) and as for DPS, you'll be spending useful cooldowns just a few seconds before the boss becomes untargetable, so yeah, fights require memorization and preemptive actions regardless of what you're playing, maybe, just MAYBE, PLD will be the less punishing in case you forget a cooldown or SAM because they're just faceroll and probably can pick up on lost dps rather quick.