I know McCartney gives a lot of credit to "the guy from Motown"(Jamerson)...really, though, except for MAYBE a couple tunes, I don't hear McCartney as a "poor imitation of the real thing". Jamerson was coming out of the upright/jazz vibe whereas McCartney was a guitarist who was into R&B, skiffle, & (later)some avant garde jazz. Honestly, my appreciation for McCartney grew as I got more "learned"...yeah, he's not real flashy-but, hey, there's another thread at this site that talks about "keeping it simple".
Entwhistle, like Jack Bruce, played in a band unlike The Beatles...both The Who & Cream used only THREE instruments; as a result, the respective bassists had a lot more room/freedom to "pull out the stops".
Bill Wyman? I honestly can't think of anybody that cites him as an influence. He's a decent enough player; I know he didn't float my boat.