Thor. Is it in the lower tier of the MCU? Sure? But it was a lot of fun, introduced the Asgard mythology decently, and Hiddleston, Russo and Hopkins are perfect. MIB International was the perfect example of a Paint-By-Numbers movie. There is absolutely no effort put into this. It featured the most obvious "twist" I've ever seen. And they some how managed to suck the fun out of Hemsworth and Thompson's chemistry.