I don't think "best" is the right way to look at it. I think different local shapers have types of boards that they really have gotten great at but it varies. Also the mid Atlantic is a big place...with plenty of room for guys like Brian Wynn or say Austin in Virginia to excel in what they do, without really competing with one another.
To me, local means within an hour drive so its easy to stop by and discuss custom shapes, look at templates, etc. Living on the Delmarva, I've been really happy with the many custom boards I've gotten from Jon Ashton. This includes two longboards, eggs, fishes, and a step up for an Indo trip. They have all been good and some have been magic.
There are so many talented shapers out there. I have seen a lot of fine looking boards on the forum from the NJ shapers, but Greg Eavey is my local favorite (Wilmington). Quality & craftsmanship is unparalleled - he shapes art. My profile has a picture of my Eavey. Check out his blog - www.eaveysurfboards.blogspot.com
I can vouch for Andrew Rendelson (ARC Surfboards), a very talented young dude who shapes out of Greenlight Surf Supply in Manasquan (Jerz). He can build anything, has an encyclopedic knowledge of surfboard design, and he also hand crafts absolutely beautiful, sweetly foiled hardwood fins. He posts his new customs here frequently.
Haven't heard any news about Greenlight specifically, but I know 'Squan got whacked just as hard as the rest of the coast. Andrew, if you're out there, holler. Wishing you and Brian the best.
Tommy Moore, who is now back in VB for a short period of time is the best hands down in my opinion. Many of the guys riding lost boards right now are on boards finished by Tommy.
Honestly for a high performance shortboard, grovel stick, alternative high performacne shape, Tommy's board are great.
Best build quality I have seen, far superior. ALso how great is it to have a guy whos shaped boards for the Fletchers, Sunny Garcia, Benny B , etc buiilding customs for us average Joes!