@Mister Dongs is probably the very best person to comment on EVS, and he's welcome to correct me if I'm wrong, but I am not sure any of those people you listed really went through what Nick seems to be going through right now. Except maybe in a very superficial sense.
EVS has some baggage with War Campaign that he seems reluctant to own up to, and Sargon had that stupid shit with Kraut and the whole falling out with Metokur, but they're pretty much exactly as they've always been AFAIK. EVS still does his comic stuff. Sargon still does his political stuff. I honestly forget WTF Signore's deal was. EVS won one lawsuit against Poulter (a second is pending in NY), and Sargon won his against Akilah Hughes.
Contrast to Nick: Nick basically did a complete heel turn on most of the things he once professed to believe, and seems to be mostly abandoning all the content that made him popular in the first place. He went from legal content a lot of people seemed to enjoy, to degenerate variety show crap, and that appears to be entirely his decision to do so. Now he's being sued for being a complete retard dumbass by saying a complete retard dumbass thing where he
really should have known better, and it doesn't seem to be going so well for him. I'm not joking when I say one of the most abrupt and catastrophic nosedives I've ever seen documented on KF.