I'm trying to figure out whether the verb in bold below is a Raising to Subject or Subject control verb.
The boys were rumored to have done so.
If it were was rumored, I could see more clearly that it's a Raising to Subject verb. You could do the expletive It test - "It was rumored that the boys did so". But since it's were, would that affect it in any way? It's being affected by the subject. You can't say "It were rumored to have done so."