Dan Frischman is an actor and comedian who played Arvid Engen in that ABC-TV sitcom. He played Chris Potter in NICKELODEON's "Kenan & Kel" sitcom as well. I've rediscovered him after binge-watching HOTC episodes. I didn't get to view all of the show at the time it was popular (because I was a PPIMI, very busy doing the Borg's work 😠). Here are links about the man and this career:
https://www.youtube.com/results?search_query=dan+frischman
So, does anyone recall him?