Well, the L.B.C Crew album was recorded in 1996 so it doesn't count. And I didn't really like the others you listed but OFWGKTA is indeed a breath of fresh air... Question is how long they can keep it up and whether they will not be smothered by their own success - hip-hop is full of examples of fresh new concepts coming out of nowhere being exploited/copied to death and quickly played out as a result, Das EFX having to change their rapping style because everyone were copying them around 1993-1994 coming immediately to mind; also, Wu, to which people often compare OFWGKTA essentially killed their own movement with too many side projects of low quality, etc. When you see Busta Rhymes rapping about raping his girlfriend in some dark basement over some insane beat, you know it has become too late...