Any tips on jazz guitar trios or quartets?

Well, almost all good jazz guitarists have their own "sound" to a great degree, so it's a little hard to recommend someone who necessarily sounds like Metheny or Benson. That said, however, you should check out the following electric jazz guitar greats, whose "sound" should probably appeal to you:
1. Tal Farlow
2. Barney Kessel
3. Kenny Burrell
4. Wes Montgomery
5. Grant Green
6. Pat Martino
7. Bill Frisell
8. Larry Corell
9. Herb Ellis
10. John Abercrombie

To the above, I would add Gene Bertoncini, Ralph Towner, Russell Malone, Stanley Jordan and Mark Whitfield.

And Jim Hall, Mike Stern, and John Scofield.

and don't forget about Cream.

Sd Cambell,to be more specific, I'm after the more laid back sad or romantic jazz or fusion guitar or fender rhodes. Thanks again