Kevin Costner is a multiple-Oscar-winning actor/director/producer, perhaps best known for Dances with Wolves, for which he did all of those things. Quite popular during the 1980s and 1990s for starring in films such as The Bodyguard, The Untouchables, Bull Durham, Field of Dreams, and Oliver Stone's JFK.
In the mid-to-late 90's he hit a slump with lesser received movies, starting with Waterworld, an After the End Science Fiction blockbuster which was fraught with production problems and ended up being the most expensive movie ever made at its time, only to flop in the United States. However, it eventually made its money back worldwide (not that anyone seems to be aware of that part). The Postman was simiarly received, although both films have been looked more fondly in later years; for example, while both were criticized for their length at the time (often called "self-indulgent" on Costner's part by critics), longer movies are becoming accepted and almost standard, leaving them unremarkable on that front.
In the 00's and past, Costner has earned his reputation back with lower-key films such as heroic Coast Guard rescue film The Guardian, the historical thriller Thirteen Days, the Western Open Range and the cerebral serial killer drama Mr. Brooks. He also visibly reined in his ego, among other things insisting that Robert Duvall be given billing above him in respect for Duvall's greater experience.