I think Smeargle should be B-. While it has the best movepool ever, it can only fill one niche at a time. It either has to be a lead, which faces competition from Azelf and Forretress, or a Batone Passer with moves like Belly Drum and Calm Mind, but that isn't very good since Smeargle is slow and frail. But still, it has some other cool stuff like Spore and Dark Void that helps it, but it is complete Taunt bait also, so maybe it isn't so good. But I think it can be a solid B- mon.
I think Venomoth should also be B-. It is a cool Quiver Dancer thanks to Tinted Lens helping it hurt some of it's would-be checks and counters, but it fails to take strong physical hits, even resisted ones, and it can be outsped and revenged by any viable Scarfer ever at +1 that it should be this low. Also faces competition from Vivillon I guess, but those two are pretty different.
If Venomoth gets ranked, this should probably get ranked also. Vivillon has the power of Compundeyes to boost up Sleep Powder and Hurricane's accuracy, making it a viable Quiver Dance threat. But unlike Venomoth, without an Hidden Power it's walled by many things that resist Flying, like Steel types. It also has Energy Ball to hit Rock types, so I guess that's cool coverage. But it has a 4x Stealth Rock weakness, about as bad as defense as Venomoth, and it's also outsped by Scarfers. But Vivillon still has a few good points, and thus I believe it should be ranked, at C or at the highest B-.
Nominating Mega Houndoom for B/B+
Mega Houndoom is pretty decent right now. Bulky Psychics are on the rise, Blissey is falling in popularity, it's got a neat 115 speed stat and great special attack and a boosting move in Nasty Plot which helps it break down balance builds. it's also got a good STAB combination which is resisted by few. Other than dual STABS and Nasty Plot, it can have one more moveslot, which is open to prettty much anything. Flame Charge can be used to outspeed most Scarfers after a boost and helps it clean up easier. Protect can be used for a safe Mega evolution, or Destiny Bond can be used to take down an opponent trying to revenge it, although most things that try to revenge it are Scarfers who outspeed it. Mega Houndoom has some problems as well hindering it. It's sort of frail, and weaknesses to common Water and Fighting types are no easy issue to get past for it. But overall, Mega Houndoom is pretty nice at the moment, and imo definetely deserves a rise.
Also nominating Doublade for A
This thing is a beast right now, walling Fighting types, Flying types like Crobat, Fairy types, and even other stuff like Mega Beedrill, making it a really splashable mon on teams right now, being a great partner with stuff like Pangoro and Hydreigon. It can set up with Swords Dance and hit pretty hard, and it has priority Shadow Sneak to help pick off weakened foes and mitigate it's low speed. It can live almost any neutral hit due to it's bulk and can even live some non STAB SE hits. Doublade has some problems, though. It's special bulk, while passable with Eviolite, isn't anything to write home about, and without Eviolite, that special bulk is pretty bad. Weaknesses to common types like Fire and Ground doesn't help, and it has tough times against bulky waters like Suicune and Mega Swampert. But Doublade is such a good mon in this meta, due to it's unique typing and stats, and being a great partner with some of the biggest threats in UU definetely helps, overall Doublade is an awesome mon and deserves to move up.
http://replay.pokemonshowdown.com/uu-253011446 (In this battle, Doublade helps by walling Reuniclus, and saves my butt by using Shadow Sneak to pick off Zoroark and Darmasnitan, winning me the match.)
^ Pulling these up for discussion.