Oh man. Just picking one general musician it would totally be Dave Grohl. He wasnt necessarily the best drummer or guitarist ever, but fuck, he can do anything. He played drums in Nirvana, guitar and vocals in foo fighters, drums for queens of the stone age, drummed for Tenacious D and a bunch of other projects. Everything he did was fucking amazing
He is an awesome entertainer
He can fuck up hard and everyone would still love him :P