Also, I don’t think anyone has pointed this out yet, but the Trade Federation guys wouldn’t work either. Anakin killed them in Episode III.
In general, I don’t think reusing old shots for the big finale is a good idea. It seems like a big nostalgic fanservice scene would have to be a decision made during production, and it just isn’t feasible here.
I don’t think he killed the entire species.
He didn’t, but those two are recognizably Nute Gunray and his assistant, and Anakin killed them both.