Murdstone
Sycamore Trees
I think if you have a thread like this you have to start by mentioning Larry Robinson, then about 50 images later you can start to bring in some other guys. He's not well known on these forums since he mostly gets commissioned for high end acoustics, but unbelievably detailed inlays.
[Insert fretboards here.]
One of the only guys that can inlay faces that actually maintain some personality:
And yes, some of his stuff is really gaudy, but customers ask for what they ask for.
These are beautiful but it's gotta be close to this point where it stops being inlay and just becomes a fretboard