there are many two handed weapons that do 2d6 or better (in early access)
Ah, I thought we were talking about 5E since we're looking at Polearm Master (which aren't in EA). I'm not sure how BG3 is going to implement it but PAM is restricted to polearms (which are 1d10) in 5E.
In terms of two-handed weapons that more than 2d6 (base damage), the only one I can think of is the giant club people have managed to glitch off the minotaur in the Underdark. Not sure what else is there.
Maybe it'll be most productive if you posted the math for the best 2 handed builds in EA right now and we can see if we can come up with any 2 weapon fighting builds that come close?
