On the same track as Ringo on this album ('I Ain't Superstitious'

are Eric Clapton, Stevie Winwood, Bill Wyman, Charlie Watts, Hubert Sumlin, and Klaus Voorman (as well as 3 horn players Joe Miller, Jordon Sandke, and Dennis Lansing).
In the context of a Howlin' Wolf recording, did Bill Wyman, Charlie Watts, Steve Winwood, and Klaus Voorman belong there, either? This was an attempt to help popularize a blues legend by incorporating 'name' players.