Which actors could have swapped roles making the movie more enjoyable for you?

Many actors are considered for roles in movies before a final choice is made.What if that choice was yours to make? Who would get the part? Imagine iconic movies with a different actor in the lead role.Actually while were at it,why not pick the worst or funniest choices as replacements as well? Maybe Pee Wee as Rambo or Dirty Harry!! Have fun with it,if you wish.