I like Clean from SS-20 really, really like! High-gain, I honestly don't remember. The cranch - that's how I do it: gain like noon or 1 (pretty high) then I take Solar 8 string and roll back volume. It's very nasty and dark sounding. Not like not enough high frequencies but like mood is dark,
Green Kraken is somewhat Marshally but jmp1 is Marshall. I think 19th standard jmp preset is jcm800. Sounds gorgeous into jvm loop! I tried it before into savage poweramp (6550 iirc), 5153 6l6, modelers and just wanted to sell it. Then I plugged it into SC20H - omg. Then buddy asked to try SC20H and just gave me money =0 instead of amp (he has jmp1 too). I bought jvm

When I bought kraken it was my second (after amt) tube preamp and I was really impressed (to the point I have immediately bought a box of those small tubes just in case =)). Heard somewhere it was inspired by 5153 so I bought 5153

Then many amps and preamps later I can't say it stands out for me. I have too much stuff and just don't remember how it all sounds :-(.
That being said I think I will buy full Countess (Jack) head. Its high gain structure is very different from what I have.