A variant on the Aero-TIE concept that just morphed into something which has already been introduced into Star Wars canon.
Created by the Twi'lek people the Death Seed (in Twi'lek the Chir'daki) is the ultimate "Ugly". A combination of X-Wing S Foils on a modified TIE Fighter body. They can assume both a flat "wing" formation and a X attack formation. (I've also added a more standard TIE formation just for completeness).
I originally was just messing with a modified Aero-TIE concept, but once I saw the x formation I realised this looked almost like I imagined the Death Seed's to look when I read "The Bacta War" by Michael Stackpole (Well worth a read if you are a fan of Star Wars).