It's not showing off when you play the best you can. If you can't put your talent on an album what are you suppose to do with it? Guitar players "show off" all the time but I rarely hear shit about it.
Excuse me, did you just call jazz a big wanking ego trip?... Dear god.... Is that really what you think?... What are you?... A rock n roll and nothing else type?.... A little narrow minded are we?... If all you like is that kinda thing, then fine, but you don't have to insult every kind of music you just don't happen to like and call it crap.
Some of the bassists that were suggested did make me think that 'good' can often equate to 'wank' (Jaco Pastorius for one. Technically amazing, but I've never heard a piece he played on that I liked... he even messed up that pop song with his farting bass), while others (like Wooten) really add a depth with their bass playing that supports what are already great songs.