I don't know if I would put Faraday in the same category as Maxwell (or Gauss).
I mean you have the early experimenters like Coulomb, Faraday, Ampere, and they basically discovered everything, but Maxwell's unification of electromagnetism is simply beautiful. Hell it was so amazing that it directly led to most of Einstein's most famous work.
Gauss is equally as influential as Maxwell in my mind, although probably not as a scientist. Gauss was a great mathematician though, and late-classical physics would not have been possible without his advances.