4's identity search seems to apply here. 2's identity is already defined by other's wishes, 3's identity is defined by what gets them credit/ the environment, they want to be on top. 4 really puts the most thought into who they are. The struggle is real. 3 might doubt that as well once they ask themselves who they are without expectations of others, yet 4 does all of that on their own pretty much.
I tried to visualize it, X represents the identity of the type in relation to others aka "O".
E2:
OOOOO
OOXOO
OOOOO
E3:
X
OOO
OOOOO
OOOOOO
E4:
OOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOX
OOOOO