"Good player."
He certainly is, but I never really listened to him back then or listen to him now when I listen to Led Zep (which I don't do very often). His bass just never stood out. And I'm not talking about playing complicated stuff loud - even something simple can stand out beautifully without added volume: Think of Glover's simplistic E-F-F#-G upward chromatic run on Smoke on the Water ... the bass rumbles in and is THERE. I miss that on many Zep recordings. Sonically he was always dwarfed by Plant's wailing, Page's dominant rhythm guitar and Bonham's - dare I say: heavy-handed -drumming.
Funnily enough, I always thought that his keyboard playing stood out quite well with Zep, Page's guitar then automatically taking a backseat.
And I credit him with coming up with that strange Black Dog riff which he credited to listening to old blues records where the players had an odd understanding of time and meter.
Uwe