If you can't provide a good description of the term "forgiving" beyond simply dropping brand names, I've got to wonder if you really "know what I’m referring too (sic)."
A little context: I've owned a pretty wide variety of tube amps over the past 56 years, including multiple Marshalls and Fenders. I've played even more - e.g., Hiwatt, Acoustic, Ampeg, Sunn, Music Man, Mesa - for long enough periods of time to become familiar with their sound and feel. I'm knowledgeable enough about tube amp design to have developed modifications targeted at altering the sound and feel, and I've on occasion performed those mods on customer amps.
Having said that, I'll add that I haven't the slightest interest in owning a Bad Cat or Matchless. OTOH, I do have intimate experience with the difference between a stock Marshall and the same amp with additional gain stages and tone shaping from mods I developed and performed.
I'll repeat my request that you elaborate on precisely what you mean by "forgiving."