He is not on the covers. If I remember correctly, he isn't even visible in the issue. I think you just see his speech bubbles as he's talking to Theresa after a love making session. Maybe you see his suit on the floor as well.
I'm sure you've heard of and seen the Hastings department store exclusive comic covers. A lot of which of the Marvel ones feature Deadpool. I didn't notice any of them on your list. Any particular reason why?