I have a deep and abiding fondness for monks, even they aren't the most optimizable class out there. A lot of that fondness stems from one my first real campaigns (many, many years ago)_ where a buddy, who was playing a monk, one-shotted an Owl Bear with the most righteous headbutt the world has ever seen.In my experience if you want a good multiattack the class to take is monk. Two attacks at level 1 and three at level 5!