High gain tube amps typically have two conventionally biased gain stages followed by a cold biased follower stage made to be overdriven. That stage would have something like a 100k anode resistor and 39k cathode resistor like on EVH 5150 mk3 but sometimes also the anode resistor has more ohms and/or cathdode less, and then there might be two other gain stages followed by yet another "clipper" stage. It varies.
There was though the JCM600, propably one of the worst sounding Marshals built ever, which used diode clippers:
https://www.thetubestore.com/lib/thetubestore/schematics/Marshall/Marshall-JCM600-60W-Revch-Schematic.pdf