I can think of a number of good individual fighters, but being a jack of all trades is a bit trickier I guess.
Eddy - always had a pretty strong presence ingame, fits the description perfectly, deadly with anything he picks up
Veteran - I used to admire his playing style a lot when I was a rookie in VU. He has a playful style, not afraid to mix things up a bit
Helix - He was a pretty old player, but one of the smartest ones I've met in this game. I learned a lot from him
Omarosh - Absolute beast in my opinion. I'm sure an intelligent player like him could lead as well.
Juan - though I would argue with others he's much more of a useful player in 0.4 than he was in 0.3, although he was a terrifying presence in a 1v1 situation, nowadays uses tactics much more and became skilled with rpg for example
XTM - the only russian I could admire skillwise, he did wonders for them
krystianoo - a true jack of all trades, great at everything, but I wouldn't say he was best in anything as well
Hanney - haven't really seen him perform in 0.4 outside of lw's, which doesn't say much about him. Back in 0.3 however, you saw this motherfucker and you ran.
Alarba - decent player, calm and assertive leader
Morphine - while inactivity did get the best of him, back in 0.3 he was a decent player and a tactical leader during our CW's
Marcell - polish hacker suka blyat, very unpredictable player
Can't think of anymore right now, more good fighters on my mind but I can't see most of them in a leader position.