I think Sartory Billard does some very exciting work, and while Armand Billard isn't as much into movements and movement finishing as other independants, his approach to dials, designs and customization is up there among the best.
His dials in particular are up there among the likes of De Bethune, Kari Voutilainen and the likes. Which makes sense, since his dials are made in partnership with Comblemine, the dial maker for owned by Voutilainen.
It was a pleasure to work with him on designing my SB05, which I should get soon.