Judging from the pictures, my vote would go to Hollows if you are going artisan. His handstitching is just perfect.
Tanner shouldn't be called handmade, and the keeper they use, is shit.
If you want something special, order a Tender & Co belt. The leather used is from Barker in England. I use it myself for belt making, and it is a really interesting and AMAZING leather.
Or else you could go ahead and order from Filson (quite good bridle), Leatherman Ltd (the Trace Carrier is great), Tory (their hoof-pick belt is cheap and quite good) or maybe Col. Littleton, if you want something unique. Or what about the Springfield belt from Narrangasett (BillyKirk may be selling it as well)?
There are plenty of interesting options available.