Things I remember from the movie. A plump man in an electronic wheelchair being electrocuted. One spaceship running in to another and it kills a woman being stabbed in the stomach. The main killer alien is blonde. I don’t think he talks unless he’s taken over someone’s body. The title of the movie has shadow or star in it maybe?
Project Shadowchaser III (AKA Project Shadowchaser 3000, AKA Shadowchaser III, AKA Edge Of Darkness).
Came across this while I've been up all night trying to figure out the movie myself. Saw it as a kid and remembered the blonde hair and replication. I remembered the guy in the wheelchair.
Also I'd like to add that it's an advanced android, but definitely could be remembered as an alien.