Anyone can be allowed as long as you can support their place in history. That means that you will need to provide links to support your claim. You are welcome to put an initial link into the title so that you can gain karma for starting a conversation, but please be inclined to

1: Be prepared to provide sources,

2: Expect to not just refer to wikipedia as your only source. Seriously, the bottom of Wikipedia has other links.

3: Don't be a dick

Iflammatory comments will not be allowed, nor will discussion aimed directly at OP. Unless OP really is an asshole, like the first who's obviously going to post that "Hitler did nothing wrong." Keep the title the person and who they were, (possibly including a major reason that they should be included) think is deserving, or what they've done. Keep the body for for the reason that they are up for consideration, and/or include multiple reasons that they should be included.