Who doesn't remember Ace Ventura Pet Detective played by Jim Carrey! This movie is a few decades old but one of those classic movies that everyone remembers! This would be a super easy costume for guys to put together.
Update: Neil Patrick Harris, David Burtka, and their twins are characters from Gotham for Halloween. If there's one thing we can count on every year, it's Neil Patrick Harris and his family's Halloween costumes being totally epic.