Top Five rock Bass players


1 John Entwistle
2 Jack Bruce 
3 John Paul Jones
4 Geddy Lee
5 Paul McCartney
6 Glen Hughes
 
OK it's six but I saw Hughes with Trapeze and Deep Purple. And one magic night in Abilene Texas he played note for note with Tommy Bolin so I give him Honable mention. 

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My quick 5:

Graham Maby (Joe Jackson)
Mike Mills (R.E.M.)
John Paul Jones
Lee Sklar (James Taylor et al)
John Entwistle
mark anthony of van halen. the story goes eddie told him "put your finger on this fret, then keep playing eight notes. we'll give you a wink when the song ends." 
Add John McVie, Rick Grech and Jack Bruce (Bluesbreakers + Fleetwood Mac, Blind Faith and Cream, respectively).  If you're looking for guys talented with string instruments, IMO it's always a good idea to start with the Bluesbreakers.

Graham Maby...Yes! He has is own jumpy style and I love it.

Also:

Bruce Thomas (x Attractions)

Jack Bruce

Jack Casady

John Entwistle

Since Paul got mentioned, maybe Roger Waters also? My understanding he is not the best but at least he did not f$&@-up the end result?