Many are made for multiple though it might only give you an edge over someone not trained rather than actual make sure you win. I would tell you to look at any traditional style which is more interested in forms and crippling an opponent than the point sparing. Most styles have some benefit but I would tell you to avoid any chains as they tend to be better at business than martial arts.
To see what works for you, find at least 4 places to visit on a tryout basis and do not sign anything until you have visited a minimum of 3. Avoid contracts and know that the "Today special deal" is a crock used to sucker in people.
As for stealth and intimidation, these are just games that can get you into more trouble. I personally like to have my students smile when they practice fight techniques.
"i also like stealth and intimidation."
Ever heard of the G.Zimmerman style? It's pretty lethal. The good thing is even if you killed someone you'd probably be acquitted.
if you like the weapons incorporated in martial arts, then the best one is the kung fu.
Probably take a look at Krav Maga
I'm looking for a martial art to join and i can't decide which martial art i want to join. I want a martial art that is good for taking out multiple people and i like the idea of weapons incorporated into the martial art. i also like stealth and intimidation.