holy fuck so many replies
Echoing stellar- Alakazam is even less interesting this gen, and Magic Guard isn't out yet. Same for Sableye.
I'm probably not going to respond to the vast majority to posts here, but I might as well address some that are borderline.
Weezing isn't that good either, and it remains woefully ineffective against Roobushin due to Guts and beefy Paybacks.
Toxicroak is probably one I'm going to take off this list, simply because it tends to shaft Rain teams. Still, it has issues with some main Rain components, especiall Kingdra, and isn't all that amazing against non-Rain, so I'm on the fence about this one.
Parasect is in the same boat, because while Sleep is hilariously useful, its terrible typing and low stats are not. I'd like to hear a little more input here.
Murkrow is a weird case. No leftovers, no way of harming Steel-types, and even after Evolution Stone, it's looking at 324/180/301 defenses, except without Leftovers recovery. It can't reliably heal against Fighting-types, because Priority Roost means that while roosting, it's automatically weak to Fighting. The Perish Trapper seems marginally interesting against teams without strong physical attackers, but the need for it to switch in, THEN Mean Look as the opponent switches in, THEN survive an attack as it Perish Songs (which can cause issues if the attacker has a nasty SE attack), THEN hope to not get CHed, THEN hope the opponent isn't using Roar (taunt variants) or isn't a physical attacker (Featherdance variants), etc... means that it's not super interesting in OU. Sandstorm and stuff doesn't help either.
Poliwrath isn't actually on the list! Read a little closer.
Primeape is horribly outclassed by Kojondo, not strong enough, among other things. Vital Spirit is "interesting", but if Ape catches a Focus Blast, it's going to be out of commission, and it absolutely NEEDS a Scarf to function.
Pinsir has a minor niche because of Mold Breaker Stealth Rock, but still isn't that interesting outside it. Considering that speed has generally been jacked up in OU, and Stealth Rock isn't quite as interesting... not to mention that Espeon isn't exactly the bulkiest thing around, and Team Preview makes it not that hard to predict Espeon coming in on a common SR user.
Tauros gets... what, from Encourage, exactly? The only "usable" moves that benefit are Zen Headbutt (a base 104 attack with mediocre coverage), Body Slam (oh man, 107 base power instead of 102), Iron Head (see Zen Headbutt), Rock Slide (Stone Edge with slightly more accuracy but no increased CH rate), and for this you're giving up... Intimidate? Encourage isn't Tauros' ticket out of mediocrity, unfortunately.
Clefable has approximately infinite options... and it isn't good at any of them in OU with its mediocre stats and typing. It's now a terrible version of Rankurusu, and the addition of new beefy Fighting-types has really, REALLY not helped its case.
Torterra: Sell me on it a little more, please. It's a legit "counter" to Doryuuzu, though it has the same Balloon issues that all Ground-type counters have, and it's still really damn slow, and Doryuuzu is really its only niche.
Shibirudon has an interesting typing and "no weaknesses", but it's damn slow, and 85/80/80 defenses aren't anything special. Its movepool is "okay", but no great, and depending on a recoil move doesn't do much for its longevity. Its ability to "counter Sandstorm teams" is dubious, as it can't use its STAB against them, and while it does get Grass Knot, it also has issues with taking strong hits repeatedly.
Armaldo is only "like Kabutops" in that it has a Rock typing and Swift Swim. Beyond that... nothing. It's stupidly slow, while Kabutops is actually pretty fast. Kabutops also gets Rain-boosted STAB Waterfall, which Armaldo also doesn't get. Nor does it get STAB Rain-boosted Waterfall, etc. It's only vaguely similar to Kabutops, and not good enough to get special treatment.
Sharpedo may get Speed Boost, but it's still absolutely paper, and its coverage isn't that great. It's also got a nasty weakness to Fighting, which makes Roobushin its nenesis, and even at +1, it's not super fast. 120/95 offenses only go so far, really, especially with defenses that are only vaguely better than Deoxys-A.
Lickilicky is actually reasonable- huge HP with Wish, as well as Cloud Nine and a stupid movepool makes it a legit counter to Weather-based teams. I've removed it from the list. I'm also considering the same for Lickitung, as it can use Evolution Stone to bolster its defenses, though it takes a significant cut to its offense in the meantime.
Shiftry with Sun Growth or NP/SD is actually reasonable, and it can make for a stupid strong mixed Sun attacker while not being quite as slow as Tangrowth. I'll remove it from the list.
Typhlosion is a one-trick pony with a pretty mediocre trick. Entry Hazards absolutely destroy its Eruption, and Flash Fire or Fire resistances basically nullify it. Other than that, its offense isn't that great.
THIS IS STILL BEING UPDATED, I MIGHT STILL INCLUDE WHATEVER YOU POSTED ABOUT