Big Sandy & The Fly-Rite Boys probably qualify - both West Coast and swinging blues..
However, I'm not sure that "West Coast Blues" is the name I'd attach to your list. Gatemouth sure swings, but he's 100% Texas/Louisiana in my book. The Western Swing thing is something that I always associate with Texas, ala Bob Wills & The Texas Playboys. But, that genre usually ends up with more of a country-jazz feel, IMHO. I think Bob and the 'boys ended up recording quite a bit in California, but still, they are TEXAS playboys!
Whatever you call it, swinging blues can be great and I like your list.
Some of Danny Gatton's material qualifies, too.
Marty
John, "Where does one place Taj Mahal?"
At the top of one's list, of course!
Maybe just not this exact list.