What four characters are on the Green Characters Mount Rushmore?

Board 8

I tallied half the topic, the top 4 is pretty set so far but theres room for an upset

the top 3 are very obvious if you skim through the topic
(|| ' ' ||) When have you ever seen three big, very smooth arcs
. /|_|\ of hair sticking out of a person's forehead? I haven't!