I won't rank them, but I'd love to see these five in new Smash Bros:
Kachi from Sin & Punishment 2
She would have fast firing projectile moves, simhilair to Fox & Falco, but rapid fire, but causes no knockback, and can be aimed. She would also be able to use a charge shoot ability, also focused on aiming, this time targeting multiple foes to hit with homing shots. Hovering for a short while with her hoverboard. Using Martial arts to reflect projectiles or even attacks. And finally, her final smash would make her hover towards the foreground on her hoverboard and attack opponents just like in S&P2. She'd be a frail character but with some heavy damage potential and good recovery
Demille from Tomato Adventure
The progenitor to the famous Mario & Luigi RPG's, Demille is a rabbit boy with tons of gimmicks to use like Cog Yoyos, Dragon Knuckles, Shoe Cars, Croc Grappler, Instant Volcanos, Magnetic Gloves, Telekenetic Helmet, and much much more
Ashley from Wario Ware
I always felt Wario should use more Wario Land abilities, so why not have Ashley be the Wario Ware representative? With Game & Wario, lots of potential was given to her: She could use her staff to fire lightning bolts, but can only fire one after aiming it at an opponent first. Ride her broom horisontally, knocking anyone in her path, at any time, she could repeat that ability while riding the broom to do a loop, or just jump of the broom before it dissapears, jumping would be able to be done while a loop too! Charge upwards in certain directions depending on the direction held using her umbrella, and spinning while doing it too, turning her into a potent drill recovery attack. Create a massive magnetic field that would hurt anyone close, AND draw in items towards her, could perhaps draw in opponents a bit too. Her final smash would be her Boss minigame from her first appearence. She turns into planet Earth, and bombards opponents with bullets from the Moon, The Earth would be controlled like a Shoot Em Up ship. wooo!
Ridley
Not big surprice ya?
Palutena
As seen in Uprising, she shows quite some potential as a playable character, that and she is sooooo funny. XD
Also, seeing as Princess Lana was inspired by Palutena, quite some fun could be had with Her, Pit, Samus and Megaman. She could also have quite some cool palettes like: Medusa, Viridi, Pandora, and even Princess Lana.