lol I'm sorry to disappoint but having not even played Vectorman and unfortunately having played all the way through that trash ass Wii U Sonic game, there is not a single SEGA character I would put below Zavok. And you're out of your mind if you think the villain of a single Sonic game that reviewed bad and sold worse is a more popular character than the leading character of two popular video games, old or not.
i'm not even arguing popularity, really. just being needlessly pedantic about your point of 4 people. but it also isn't the 90s anymore and we have examples of former success not leading to present popularity. just look at bubsy.