I really like the Dirty Loops video you put up, but I'm a bit less hot on the other ones.
As for favorite bassists, in no particular order:
-Marcus Miller
-Victor Wooten
-Les Claypool
-Larry Graham
After that it's tough to really pick a favorite, but maybe Stuart Hamm?
As for bassists that need more exposure, well here comes a list:
1) Alain Carron for sure.
Actually he's definitely near the edge of my top 5 as well.
2) Garaj Mahal.
Somehow I keep forgetting about this guy, but he is fuckin' awesome!
3) Whoever the bassist for Slave is.
If you like Funk, it doesn't get much funkier than this:
Can't believe I didn't know about them when they were still together! ARG!
4) Psychostick's Bassist.
They're something of a joke band, but their bassist is actually pretty damn good. Also the group itself is awesome.
5) Abraham Laboriel
I don't see a whole lot of material from this guy, but when I do it doesn't disappoint. Also he is straight up making love to his instrument when he plays.
6) Bill Dickens
This guy's technique is ridiculous, although I admit I can only listen to him in small amounts. That said he is very impressive.
Okay last one for now...
7) Fingersmorean
This guy comes from youtube but has managed to go on tour in Canada and release an album thanks to his youtube following. He's pretty damn good and has an original style, although he's been inactive for a long time now unfortunately...