Jed Clampett wrote :
... He wants to be dominant and free.

I seriously doubt it.

My question is, will neutering cure the problem dog of these
independent and aggressive behaviors

Depends. Are you planning the surgery for the dog, or yourself?

or has he been in the wild too
long, early in his life, and will he carry these tendencies with him
until he gets a few years older and settles down?

Time cures many things, but temperament and experience cannot be changed by
the mere passage of time.

--
Mary & the depleted Ames National Zoo
(Ranger, Duke, Rhia-cat)