guy represents Chinese martial arts. mainly Bruce Lee as well does Lee. he doesn't use "ninja magic" simly because Kishi has chosen to give hima reason not to.
Lee, i sth ereason. He is showing that Taijutsu is all you need to be a great ninja. Due to the rules Lee may never be a Jonin though.
Although, Kakashi is the other reason as well. Him being his rival and knowing 1000 jutsu. Guy is choosing to do the opposite to eventually defeat him.
ONLY ONE NINJA HAS BECOME A NINJA W/O KNOWING NIN OR GENJUTSU.
If you think about it the whole team is pretty lateral in techniques.
Lee and Neji Taijutsu and Tenten with weapon summoning.
I think Lee has the potential to beat Neji, just saying. Speed and power.