To try to move the topic in a more productive direction, what are say the top 5 threats in ubers. Kyorgue is definatly up there along with arceus, but what else? Mewtwo maybe?
It's hard to pick five Ubers as best, so I think instead I'll just give five categories and the best for each.
In terms of best Uber, it's definitely Arceus. Not because its sets are impossible to deal with (they aren't), but because of the sheer amount of roles it can fill on any team. It can do pretty much everything short of Spiking and spinning, and hell, it almost can do that with Magic Coat. There is almost always a reason to run Arceus somewhere on your team. What role and type it has just depends on your needs.
Most deadly goes to Mewtwo. It can wreck almost everything with the offensive CM set, but Taunt CM Lefties Mewtwo is still also pretty deadly, and completely dismantles a lot of stall teams.
Most powerful? Definitely Kyogre. Specs Water Spout is the most deadly move in the game, hands down. Nothing except Palkia and the specialized lower tier mons is switching into that safely. Pretty much all of its sets are good, but Specs is really the best in my opinion.
I'll add a non-Uber for best supporter. Ferrothorn. It's like this thing was tailor-made for the Uber metagame. It's made Scizor completley obsolete as a Dragon-type resist, actually threatens any Kyogre that isn't Specs or running Scald, and has kept Spikes as common as ever in Ubers, taking over Deoxys-S's role. Thunder Wave and Leech Seed are also cool for messing up shit.
And lastly I'll throw in best revenge killer. Scarf Palkia. It's one of the few things that can deal with Kyogre, revenges a lot of threatening stuff, and just generally acts as a glue for a lot of teams. It can't revenge kill Extremekiller Arceus, though, so I'd say Scarf Terrakion is probably the best for that role.