I've used:
west african shea butter =too hard unless it's whipped or mixed with something else
east african shea butter= love it, very soft melts into your hair, it's been my staple this year, and it's my new fav
avocado=soft but not as soft as east shea and gives good results
mango butter= grainy difficult to work with unless mixed with something else like oils
aloe butter=soft, goes on easy, but it's mixed with coconut oil already I think.