I really do not feel like doing the main quest again, let alone dealing with annoying dragons again, I prefer a game with none of that (because I have done it all before and thought it was the worst part of the game tbh).
I have been looking for a Dragon Elimination Mod and no one has cooked one up yet, at least one that does not cause other problems. Even if you finish the MQ, you still get dragon attacks.
However, if you never start the MQ, then you never see the dragons. In fact, you can start the MQ and go up to a certain point and not ever see the dragons. The only problem with this is the Jarl of Whiterun may trigger the Dragon appearences if you speak to him at the wrong time. I think it is possible to do what you need to do in Whiterun, and avoid the Jarl. Unless you want the house, but there may be a way to get past that too.
I have 4 characters who have not started the MQ and probably never will. However, they have all avoided the Keep in Whiterun.