Your link with the by line "unmask antifa" has rather little credibility (Edit: your guy is editor of The Post Millenial - "Follow Us On Parler"). For good or ill, "antifa" is a just a label for a wide variety of groups that aim to fight "fascists" in the streets. These range from random leftists to the somewhat unhinged, who indeed get regularly banned for overt calls to violence. Which is to say there are no "top Antifa accounts". Twitter bans all sorts of people regularly for all sorts of things.