I got interested in the subject of EGOTs lately, mostly out of the dual motivations of "That 30 Rock sure is a funny TV show!" and "Whoopi Goldberg? Seriously?"
"EGOT", as the link above will inform you, is an acronym for "Emmy, Grammy, Oscar, Tony," and is typically used to refer to the 12 people who have won all four awards.
In theory, you think of such winners as multi-talented threats, but most EGOTs limped into at least one category, sometimes more. Let's examine them in chronological order of EGOT-acquisition.
[a note on research: cataloging performer awards is one place where IMDB is generally ahead of Wikipedia, but they don't always care about Grammys and Tonys, which makes this research somewhat interesting]