Ok.
Anyway, looking at NFEs of OU pokemon (going in alphabetical order of the fully evolved form)
Kadabra: Outclassed by Espeon
Chansey: Very viable, a good special wall.
Shroomish: Lol. Well, it does outspeed parasect and doesn't have any nasty 4x weaknesses, but there are many better pokemon.
Bronzor: Doesn't have the attack to do anything, many better options for support, and it's a mediocre tank, even with the resistances.
Phanpy: Hard to say, but it looks like it's outclassed by sandslash. That HP is surprisingly good though, and it gets some useful moves. Almost definitely not viable though.
Dragonair: Stats just don't seem good enough to me, but worth a try, even if just for the defensive typing.
Diglett: Far too frail. Would only be useful to switch in to a choiced electric move, and there it's outclassed by trapinch.
Dusclops: I'm surprised I haven't seen this one yet in UU. A great tank, though possibly outclassed by spiritomb.
Electabuzz: If only it got motor drive. Decent UU electric pokemon regardless, though raichu seems to be better.
Prinplup: Mediocre water pokemon
Vibrava: Stats are way too low.
Pineco: lol
Haunter: Mostly outclassed by mismagius (unless you really want the poison type or the extra 10 special attack)
Gligar: Has some useful sets, and is unique in typing in UU. Stats are decent enough as well
Magikarp: lol
Hippopotas: Good for sandstorm teams, which can be surprising and hard to beat in UU when supported by pokemon such as cradily and probopass (who are ridiculously strong special walls). Might be able to survive a physical hit and get a Yawn, Sand tomb or other support move in. A contender.
Monferno: Mostly outclassed by blaziken (who it outspeeds lol). Still probably not worth using.
Eevee: This reminds me of when people felt obliged to use it in an eeveelution novelty team.. Glaceon and leafeon make this pokemon not worth using.
Seadra: Many better water pokemon. They gave it crap special defense in GSC because they knew it would evolve and never be considered for battles again.
Riolu: lol
Machoke: Easily revenged killed, but good for confusion hax. Mostly outclassed.
Magneton: Already an analysis
Piloswine: 100 attack and ice shard, with great hp, good defense and passable special defense. It's a contender, especially on hail teams.
Metang: Hard to say. Doesn't look like it can really do anything worthwhile.
Nincada: Good typing, utterly useless due to lack of stats
Porygon 2: Already an analysis, and for good reason
Rhydon: Great pokemon. I'm surprised I haven't seen one in UU; it's a solid pokemon that is especially good in a Hippopotas team.
Shelgon: Good attack/defense and no 4x weakness, but probably doesn't have enough usability to justify a team slot. Might be worth a shot though.
Scyther: Already an analysis, and for good reason
Munchlax: Hmm. Doesn't look half bad. Chansey is a better special wall, obviously, but 85 attack could be quite useful in UU, and its speed would suit a trick room team. Hard to say.
Staryu: Lol
Marshstomp: Outclassed by the other water/grounds
Tentacool: lol
Togetic: I saw someone use one of these. Speed lets it down, but it could be put to some use with serene grace.
Pupitar: Use golem or rhydon
Sneasel: Could be a good sweeper, but is a bit too fragile
Yanma: If only it got BP. Useless.