It really depends on the specimen, so unfortunately can't give you a 100% guaranteed answer.
I actually have an engineer goby and SFE that are both 14" long, and they hang out together in the same cave structure. It's really interesting to watch. The engineer goby digs tunnel structures in the sand, and then the SFE moves in with him when he's done.
So far no dead clownfish, although the eel does exhibit aggressive mannerisms towards the clow during feeding.