If I don't notice the bass line and can only hear the song, then I'm happy.
Regarding whether a bass player themselves is "good", unless you are in the studio when the a bass line was recorded, you won't know if the bassist created the line, or has been told what to play.
A good bass line, doesn't always mean "good" bass player.
But what do I know...I like the Beatles, hate some jazz, and don't rate Mark King.