Would bastard swords qualify? As in, have the 2handed animation, but SWF would work?
I swear I heard of a named quarterstaff that was considered bugged and in the game it was considered as both a two hander and single weapon? Crescent something?Bastard Swords and Dwarven Axes can get the benefits of SWF (as long as you are only wielding one weapon) and also get strikethrough, although the THF and SWF line of feats are mutually exclusive, but you can pick up THF Speciality feat at level 31 to gain +120% Strikethrough that will work with the speed boost from SWF.
As for the 2-handed animation, I doubt it since they aren't 2-handed weapons, but I've never checked it.
Well, to be fair, it's called "single weapon fighting" not "one-handed weapon fighting"why would it