Except that with her track record of
actual fighting, it renders it null and void to the point that the comparison can't be given.
The Villager, unlike these supposed characters, has pretty much nothing. Not only does he theoretically not fit the vibe, but neither does his series.
I'm going to make a few guesses at who you are going to say would be compared.
Peach, I already covered.
Zelda, has done actual fighting in Wind Waker, Twilight Princess, and Spirit Tracks in order to assist Link take down Ganondorf and Malladus. Prior to that, she is
implied to have had off-screen action in OoT as her Sheik persona, even to the point that there is official artwork of Link and Sheik back to back against a horde of enemies with her knife drawn.
http://images3.wikia.nocookie.net/_.../Link_and_Sheik_Battle_Ganondorf's_Hordes.png
Mr. Game & Watch? Technically, he doesn't exist in the Game & Watch series; there is no "Mr. Game & Watch" in those old games. He is based on the various generic characters within all the games, however, and the characters themselves have done violent actions, such as hitting moles (Vermin) and
each other (Judge) with hammers, and throwing firesticks and otherwise try to set buildings on fire (Fire Attack).
Kind of different from a game where the objective is to live a happy life, and the only form of "violence" available is to put a bug net over someone's head or dig pitfalls for practical joke.
R.O.B., is more of a clean slate than anything. He was a peripheral, rather than a real character, which means, if making him into a character, there is nothing that states he can or can't fit a fighting vibe. Though if you want to get technical, he did participate in the rather chaotic racing of Mario Kart in MKDS, and a giant R.O.B. served as a boss in one of the Boss Microgames in WarioWare: Smooth Moves wielding a NES Zapper, in the game based off of StarFox. And then the whole R.O.B. Squad deal, although that's a case of the chicken and the egg, whether Sakurai thought to include the Squad first or R.O.B. as a character first.
Olimar, while not known for
fighting, persay, his series is about survival by controlling Pikmin to attack. In Brawl, he fights by....controlling Pikmin to attack.