First off practitioners of a Martial Art are Martial Artists NOT players. Martial Arts are not a game to be "played" unless you are in the ATA.
There is no best, better, most bad ass, most effective Martial Art, PERIOD.
If there was every military in the world would teach it, obviously they don't all teach the same thing so.....
Quality instruction in a realistic way by a competent instructor in MUCH more important than what style it happens to be. There are good and bad schools in every style.
Now that being said a Traditionally taught class will be better for self defense than a sport oriented class, other than that choose based on the instructor and his ability to share what he knows, not style. It is better to learn from a good Martial Artist that is a great teacher than a Great Martial Artist that is a mediocre teacher.
No such thing as all even, but I'll bite and play your game.
1. muay thai
2. kyokushin karate
3. wing chun
muay thai and kyokushin actually are in a very close in effectiveness in my book. kyokushin started out as karate that was tested in many different fights(some human, some not human). around the 80s, I believe, kyokushin reps went and fought muay thai. don't remember the results but it ends with kyokushin adopting a lot of things from muay thai. so kyokushin has it's original karate element for the better or the worse, and has new muay thai elements for the better or the worse. but both muay thai and kyokushin produces many brilliant fighters. in between these two styles, I would usually say it's about the person than style.
wing chun is highly effective in terms of kung fu. the straight line, efficiency of smaller movement, solid base, and using another's limb against them is brilliant. but there is too much high theory that doesn't translate well into the dirty chaos that is the real fight. for the brilliant technique it teaches you, it also binds you into it's techniques and gets in the way for freely expressing your fighting sprit, for the lack of better description. either way, it was the first style of bruce lee and by that itself makes the art interesting.
No.... You want to play a game of what method is better.... It doesn't work that way. Because no fight is ever "assuming ALL is even" (no situation is made up of completely "equal" factors).
Each method can have an advantage given different circumstances.... such as different terrain one is fighting on, the available area for combat, obstacles in the environment, ferocity of the fighters involved, psychology, etc. etc.
Example: Put two guys with the same level of experience fighting, same level of mastery of their chosen method, same age, same fitness level, same psychological factors and ability to cause real injury.... And put them in a caged arena or "octagon" for a MMA style match with rules and limits on techniques (i.e. no eye gouging or "illegal" hits), the Muay Thai guy is probably going to have the advantage. But take the same two guys, in a real life or death self-defense situation IN A SMALL ELEVATOR, and the Wing Chun guy may have the advantage.
But you cannot claim one method is better, because you cannot control the environment and every possible factor that can influence the outcome. A few drops of sweat on a slick surface can mean the difference between landing an effective kick or someone ending up on the @$$ and at the mercy of their opponent.
So.... No. Not playing your game of "Which is better?"
In my humble opinion:
1. Muay Thai
2. Kyokushin Karate
3. Wing Chun Kung Fu
Muay Thai and Kyokushin Karate are much better than Wing Chun Kung Fu because they also train you physically(strenghtening your body) and prepare you for the fight mentally(sparring). Also they are more effective. I chose that Muay Thai is better than Kyokushin Karate, because it is more brutal and has more effective punches and kicks. It's also teaches how to fight from a long-range(kicks and punches) and from short range(elbows and knees). It's the most effective stand-up combat sport that I know. It's in my opinion. Don't like it - say your own and don't reed mine.