Monk has the least buttons of them all.
It's the only class in game that I have convenient keybinds used for skills that don't matter.

The 3 fist stances, take away a lot of must press buttons.
One Ilm Punch can be shoved into a corner.
Haymaker can be ignored outside of soloing.
Few ogcd buffs, coupled with a couple of long-ish cooldown skills that you only have to press now and then