Well I dunno much about dragon specialist artist but I've seen these artist draw dragons pretty darn well if you happen to never heard of them before

NeonDragon
Jackrow
Sixthleafclover
Noben
Narse
ovopack

I say these guys draw dragons pretty good and I like them
I would say others like Avezola or Shyguy but it obvious that you already know of them :p they do draw dragons pretty damn good especially Avezola
Heh I'm guessing you want more arts of your Gooey Durg huh? He could use more especially Miro tho
Also I feel like one day you should get a chance for Shyguy to draw Milly if that chance ever happen heh. Well I hope these suggestions helps somehow.

Xinminjeng is an option if you're looking for someone outside the ring of popufurs with a unique style. She's humorous to speak with when she isn't busy, which is a bonus.

LizArt
Voregence
Vorelord
NummyNumz
VoreKingdom
Avezola
Etheross
Taihab
rajii
Narse

these are personal fav artists

Im too bad with nameeees

I draw dragons. But not as much as I used to. But one artist I like is TwilightSaint.

First one that came to my mind was Isvoc, AKA  leilryu such good dragon art from her~