If tune playing is allowed as well I'd nominate the band (name now I can't remember) that featured Ralph Jordan and the late Nigel Chippendale. Simply stunning stuff and the sort of musicianship that was strangely encouraging. I have often heard a musican and thought `that was so good I think I'll give up trying' but Nigel and Ralph together made me think `if I can get to be 10% as good as them I'll be bloody amazing'. Haven't got there yet, of course, but had a lot of fun on the way.