You'll wanna add Joe Konkoly to the list. He took over for TJ Thompson at Elderly in MI and builds really nice trad stuff.
David Eichelbaum also builds (quite well) in the trad style.
Not sure how often it happens now, but Bill Tippin has built many Martin style guitars over the years. His 12 fretters especially, but he does OMs, too.
Leo Posch.
Bob Altman.
Mario Proulx - definitely Martin inspired but with a twist (see the OM/D)
Roy McAlister. (see 12 fretters and OMs)
Ronnie Griffin. Great maker, rare to see his work out in the wild (known for the dreads, John Arnold connection as well)
Frankie Montuoro for SURE -
https://www.fretboardjournal.com/col...-bench-copies/
Bob Thompson.