When it comes to Looks, specifically (and more precisely, Looks related mostly to video gaming / very stylized types of characters) I believe that VGC / Neci is among the Top of the list here. The attention to detail, and how much he's simply pushing for the best that VAM actually allows is inspiring. As I said, he's mostly focusing on video gaming-related characters, so in that regard, in that field yes I'd say he's a gem and not enough people talk about his ports or mention him in posts. So I'll take the time here to do so.
hub.virtamate.com
And there's a bit of bias I suppose, because it was thanks to him that I actually discovered what VAM even was to start with. I was doing some Google Images search on MK9 characters and found pictures of what I could best describe as "what if MK9 characters retained their in-game look and style, yet looked somewhat more real", and I knew it was another software outside of the game; I just didn't know (yet) that it was a port for Virt-A-Mate. It only took some clicks to end up on his Patreon page and then here on the Resources Hub... and the rest is history. It's been about a year and a half now and despite me going through literal hundred+ Looks from dozens of artists I still think he's probably Top 3 (in the field of gaming characters) for the whole Hub.
So there you have it, me gushing about his work quality (he's very busy right now though, please don't flood him with Commission requests lol, although I do think he closed Commissions for the time being until later this year).
Now, with this said, moving on to another 'field' of Looks: "Lookalike" characters (from Movies and/or TV shows, etc).
I know some might disagree, but VecTerror is simply the best (overall) in this category of Looks.
hub.virtamate.com
I'm not saying 100% of what he's done is impeccable. BUT, most of his works are very good to me. I did try various ports of 'lookalikes' and with a few select others here and there I always have to go back to VecTerror. I don't know what's the entire procedure to do what he's doing (face scans and so on, dunno) but it's magical especially in motion in VAM (it's one thing to look at preview pictures, it's another thing to have X, Y and Z actress pretty much literally existing in a VAM scene and your brain almost forgetting "it's not really her").
So yeah, those two are my picks: VGC Neci, and Vecterror (for their respective character styles category).