I've always loved Baxters style in the Doobies and Steely Dan.
I think Jim Henson even made him into a Muppet® named Floyd Pepper.
That moustache is a trademark of Jeffs.
Found this on great moustaches of rock:
SGT. FLOYD PEPPER - MUPPET 'STACHE AWARD
Everyone knows him as the bassist for the legendary Dr. Teeth & The Electric Mayhem, but his wild orange ’stache takes the Beatles' influence to insane new levels. He wears the best handlebar in rock since the Doobies' Jeff "Skunk" Baxter.
Clete