I think if Bae is dead then Rumpel can’t bring him back. I was watching Ep 2 and Maleficent said something like even this curse will not bring back what you love, so i don’t think the curse can do that. I don’t think it can bring someone back from the dead. It is possible that Bae is not dead though.
But I think it is possible that Rumple might be able to bring someone back from the dead now that he has Love Potion #9. He made a big deal about how if you can bottle love you can do anything. But I am also not convinced that Bae is dead so I don’t know if it matters anyway.