http://www.youtube.com/watch?v=KLFZzInXAWI
Thing about Akavir is we know very little about it, but from what we've heard it mirrors Tamriel in a lot of ways.
I'd actually compare Tosh Raka more to Tiber Septim than Akatosh despite his name, personally. Dragon Emperor and all that. But that's based on what very little we know of this person who may or may not exist at all.
The only types of Akaviri ever encountered in Tamriel for certain were Tsaeci and their human captives, Snow Demons of Kamal, and as referenced in the First PGE, other strange races of beast people like dogmen who aren't referenced in any other source, but who actually were a part of an Akaviri invasion of Tamriel. (It's possible these were slave races from subjugated islands between Tamriel and Akavir.)