Best fighting style?
Well,that's really your opinion. Personally wing chun and jeekundo are my favorites
You may be able to say that do to its versatility but that would mean that mma is also in the same category as it since share the techniques of multiple fighting styles to form one.However,the best fighting style for each person depends completely on the abilities of the individual asking the question.But,I'd say that it is JKD or mma seeing that any style can be included into its practices.
IF there was one fighting style to choose, it would be wrestling. It is wrestling because it the best base for controlling whether the fight is standing or goes to the ground. Brazilian Jiu Jitsu is most likely second. There are different kinds of wrestling such as Greco-Roman, Catch a Can, Submission, Freestyle, etc.