Serious anti war 3rd Party 1968

Could the anti War movement have been more or less united around the idea of a Presidential candidate outside the main parties?

If so who would have been the most powerful candidate.

I have to say the idea of 4 more or less serious candidates in a Presidential election is in itself interesting.

Oh and if this person won a majority of the electoral vote by getting a third of the popular vote (assuming say 12% for Wallace and Nixon and Johnson both getting less that 30 %.) Might there be any serious effort to prevent them taking office?
 
This means the Democratic Party shattered into three rival parties. Unless Humphrey pulls off a Truman(most unlikely) then Nixon wins by a much larger electoral margin.
 
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