Need to know: big names

Who are the biggest 'names' across the industry in your business?
Whatever business or sector you're in, certain people will have made their name in it.
There are the urban legends and there are the people you always hear referred to if someone does something innovative, particularly successful, or new. The reason these people are remembered or spoken of is that they have achieved something different, changed the business model in some way, or challenged perceived wisdom.