My cat has become so picky all he will eat is treats. Does anyone know a healthy cat food that my cat would actually eat????

I have wasted a LOT of money on cat food. I bought dry food from the vet...had to give that away. I bought Blue Buffalo chicken flavor dry food....going to give that away soon. I used to buy wet food, the gourmet stuff (might have been friskies) where the meat looked so good I would have eaten it myself on a bet. Had to stop buying that because he would take a bite and walk away.

I am looking for some kind of cat food that is even MORE delicious than the treats (Temptations). Any suggestions?