How about band members who play but can also sing really well? I'm not talking about the frontman who once in awhile picks up a guitar and plays a few chords, but somebody whose playing is core to the band's sound but can also carry a song vocally.
People like:
Don Henley
Jack Bruce
Lindsey Buckingham
Christine McVie
Glenn Hughes
People like:
Don Henley
Jack Bruce
Lindsey Buckingham
Christine McVie
Glenn Hughes