No way Shulk is right next to Ganon -- when used correctly, man that dude is awesome. His riposte is one of the best I've seen, KOing in the low numbers under his Smash boost. Ironically enough, however, I've gotten some play out of Palutena, and I've had moderate success, even though my Ganon track record is quite dismal! The guy hits like a truck on steroids, but he is slower than a melting stick of butter on a hill.
I also really like Charizard. He seems quite capable to KO things, especially with Flare Blitz, an attack that strikes up to twenty-nine on the first blow, albeit easy to counter via simply blocking. It also feels like his Rock Smash has been nerfed quite a bit, and his midair flaps are not as they were. In fact, several of my own deaths were from me being knocked down, leading to his poor aerial recovery. Flare Blitz is also quite amazing at side recovery, so perhaps it's for the better that he doesn't have that much of an aerial recovery, ironically.
Dark Pit is also quite good, and I like him better than regular Pit on most occasions. He has more finishing power at the sacrifice of some speed and a worse bow, but I'm okay with that because his recovery is unbelievable. Plus, his Final Smash is better.
Rosalina and Luma also has to be one of the most irritating characters to face with a ranged character (such as Dark Pit, Samus or Palutena, in my desperate attempts to find out if I could make her good). Luma's hitbox is at the right height to make projectiles hit it instead of Rosalina, so nearly every one of my attacks that I was saving for that KO, or just even some of Samus' missiles, went to Luma instead. Building up damage is the hardest thing to do against this character. Once Luma was defeated, I figured Rosalina would be somewhat defenseless without the star, but as it turns out I only broke the shell to reveal the equally hard nut. It's quite impressive just how fast and hard hitting she can be. Easily an A rank character.
I've had the opportunity to fight with a Little Mac main over Wi Fi, and I can attest to his ground game. Even though I've managed to dodge all his KO Punches, leading me to doubt its viability in the long run as those dodges allowed me to find some openings to strike back, his Side Special was quite impressive as it armored almost everything I had (I was playing Dark Pit at the time). I found that Charizard was the one that could really put a hurt on the boxer, as I could repeatedly knock him into the air with Dashes and Smashes for easy damage, and intercept him with Flare Blitz and Rock Smash every time he tried to get close enough to me to deal damage on the ground.
Palutena, though, can be good if they allow custom moves in tournaments as her custom moves are actually quite impressive when used correctly. Although, I must state that she is quite punishable if she whiffs almost any of her Smash attacks, Grabs or even her standard specials.