Disclaimers: This is the stuff you ignore before getting your blood all angered up and arguing in the comments!
-I am discussing the 1e PHB Fighter.
-I am NOT discussing the OD&D Fighting Man.
-I am NOT discussing the 2e Fighter, optional rules in Dragon Magazine, or weapon specialization introduced in UA. Although weapon specialization did help fighters.
@Snarf Zagyg - your disclaimer list is missing one key point: are you talking about the pre-UA 1e Fighter or the post-UA 1e Fighter?
Weapon specialization in UA made a pretty big difference between the two. Pre-UA the Fighter was great. Post-UA the Fighter was, at low levels, a bit broken.
¯\(ツ)/¯