The dude from maroon 5 (Mickey Madden?) possibly?
I think his lines are subtle and really add depth to some of their songs. For instance "Sunday Morning", I think the bassline makes that song.
Also the guy who did bass on alot of mamas and papas tracks, in particular "dream a little dream..." for the same reasons. It isn't exceptionally technical or flashy but it really adds to the song.
My two cents.
Ash