Yeah I never got the disdain for Costner.
Fandango, Silverado, American Flyers, The Untouchables, No Way Out, Bull Durham, Field of Dreams, Dances With Wolves are all really enjoyable films (they may not be high art but they are entertaining) he did between '85-'90, after that it becomes significantly more spotty until Hatfields & McCoys which I thought was top notch.
Good for him getting another shot at being a leading man.
Good list. Havent seen Fandango or American Flyers, but really enjoy the rest. Id also add to your enjoyable list A Perfect World, Robin Hood Prince of Thieves, Tin Cup, and Mr. Brooks. I also enjoyed The New Daughter, The Guardian, Waterworld, and The Postman but could see how some might see all of those as bad as well. Still gotta see Open Range which everyone raves about and JFK which is rated highly. Another recent one that I thought was enjoyable but also really well done overall, Costner had a smaller role and it surprisingly starred Ben Affleck, was The Company Men.
Really to me, Kevin Costner and Tom Cruise are quite similar. Both are actors who Id never call more than better than average, if that, but have a penchant for making enjoyable movies. Costner's star power has certainly lost more luster than Cruise thru the years despite both gaining fame at right about the same time, and being fairly close in age, but their acting abilities as well as limitations are quite similar, as is their ability to make a movie worth watching and striking gold here and there with a few movies that are/would/should be widely considered there best.