(written from a Production point of view)
Chuck Magnus is an actor who played the Ramuran Reskat in the Star Trek: Voyager episode "Unforgettable". He received no credit for his appearance and was identified by the name tag of his costume which was sold off on It's A Wrap! sale and auction on eBay. Another unfinished costume for him was also sold off on eBay. 
His only other known acting appearance was the role of a waiter in the Melrose Place episode Sole Sister (1996, guest starring Gail Strickland).