DPS class with the fewest buttons?

[Inosaska]

I want to see those MMOs that didn't have button bloat.

Guild Wars? You're limited to 8 (I think 10 in GW2) so that'd be one.

Aion, Warhammer, WoW, FF14, just about every MMO I've ever played ran into the "too many buttons" trap.

I take its been awhile since you've played WoW. Now a days there is very little in terms of buttons in the game itself. Everything has been simplified more or less. Example in this video. https://www.youtube.com/watch?v=eZf3JstrAXE