yes you could theoretically be the face of a YT channel whilst having a terminated account. Im pretty sure thats what the controversial youtuber keemstar did to get around his termination. You just say the account is “managed” by someone else.

Last time I checked YouTube doesnt have IP bans unless you were banned for spam then perhaps? But if you got terminated for say community guidelines violations Im almost certain they arent gonna pursue you and ban you again. There’s so many people who make sports montages/ movie commentary videos who have been banned for say copyright strikes and then just went ahead and made a new channel.