This is a bass line from my youth. Learning this as a 16 year old, I didn't appreciate at the time how brilliant this bass line is.
It's Finley Quaye's Even After All from his 1997 album Maverick A Strike. This was big in the UK, spawning five singles.
I wonder if anyone outside the UK (and not of a certain age) knows this one!?
The bass line was written and played by the album's co-producer, Kevin John Bacon. I don't know much about him as a musician, but take a close listen to this bass line. It's a masterpiece.
The tempo of the song is 94 BPM, and the languid, relaxed nature of the line, plus the fact that the 8-bar riff remains the same throughout, lulls you into a false sense of security.
This bass line seems easy, but it's not really! Not to play it cleanly, in time, and musically.
Here's the original. Take a close listen and pay attention to how the line starts the song off on beat four and a half.
For a bunch of other great bass lines, check out some of these songs:

One riff that could be seen as underrated is Donny’s piano intro (which I think the bass follows) in the “Donny Hathaway live” recording of “The Ghetto” (Live at the Troubadour, Los Angeles, CA). Fairly straightforward but very hypnotic and effective and instantly recognisable.
That is a great riff!