If I had to pick, I'd go with Feller and @Dr Blake Bloxham hands down. They've consistently produced the best results that I've seen, are ethical, have an extensive social media presence showcasing their work, and are very professional and collegial. Their techs have lots of experience as well and they get the most grafts out of a tissue that I've seen as compared to other clinics.
Are you looking at FUT or FUE? They're great at both and from the FUT results I've seen, you can't even notice the FUT scar. Here's a great example where the scar isn't visible:
https://www.hairrestorationnetwork.com/topic/54735-2700-graft-fut-by-dr-bloxham-in-great-neck-ny/