I never saw Black Grape. I did see the Happy Mondays at Glastonbury one year, 1999 or 2000 I think. They weren't very good but it was great to see them live. Black Grape were better on record and I suspect they would have been better live too.
Been listening to the Ruthless Rap Assassins a lot recently and Kermit was great in them as well. More Hip Hop style though, obviously.