Have you checked these ones out? These are the ones which just come first to mind for high gain, excluding those you've already mentioned, but likely more than a few others!
Derailed Ingrid Based on: Trainwreck Circuits® Express
Placater Dirty Based on: Friedman® BE-100
Archetype Lead Based on: Paul Reed Smith® Archon®
ANGL Meteor Based on: ENGL® Fireball 100
Solo Based on: Soldano SLO-100
Revv Gen Red Based on: Gain 2 channel of the Revv®
Line 6 Badonk Based on: Line 6 Original inspired by the original
Cutting through the mix is often more a function of EQ rather than 'amp' itself, but yeah gain also might impact.. https://reverb.com/news/5-ways-to-cut-through-the-mix So use the EQ!
Also are you choosing your cab and mic + placement? The default cabs/mics aren't the greatest imho, to get a good feel about the amps, you're better off setting up your Go not to automatically switch cab when you change amps. That way you can get familiar with cab + mic, and then get familiar with each of the amps. Otherwise when changing amps it changes cab/mic & you then can't hear the amp vs cab/mic if you get what I mean, and imho you'll hear more of the amp/mic than amp itself...
I'm guessing that you're also using a distortion pedal or boost? Many have an effect on the FR (frequency response) so choosing the 'right' distortion pedal might help you cut through! Also choosing the correct mic + cab would also certainly help cutting through the mix; many of the 4x amps have a 'rounder' FR, some of the 2x or 1x speakers being more mid-focused might also help you cut through! And don't also forget that you can change the 'sag' and other cab/amps params to make the sound tighter however you might want to tweak. (likely mentioned in vid below). But yeah, you should have plenty of high gain amps in Go!
Also I just stumbled in this, might help! (haven't watch it yet myself)