Lindsey is not a spotlight hog. He went on his OOTC tour with a guitar army!! There were girls AND guys in it. I think that if the right, compatible guitarist came along and Lindsey and this other person sounded good together, he wouldn't be opposed to it.
I don't think LB and PG would be a good team tho..WAY too different of styles that just don't mesh, IMO.
My ideal FM would be:
Lindsey
Danny
Stevie
Christine
Mick
John