Nope, not him. And not New Salem . But, yes, I'm sure you have seen that face before.
As a hint ... his first name is the same as that of one of our grandchildren.
Well, its not that bad a hint. Probably cuts out Bowling Green. And Hannibal Hamlin.
Hint #2 In a crucial way this person was the opposite of John Wilkes Booth.
Hint # 3 (I'm going to bed soon) ... This person's significant action had a parallel with an action by Australia's Ned Kelly.
When he was captured, Kelly was wearing something which related to that action.
(Not many Australians would know about that 'something' )