I would be willing to say Splatoon, except Splatoon obviously hits these stages where all of a sudden the latency drops to shit and when the latency drops to shit the framerate also drops to shit and then the system never recovers/resynchronizes with the server and you get kicked for having a connection error.
If it wasn't for those moments, Splatoon would be wonderful. I never feel lag in that game at all in any other circumstance. It's just, say, once every 30 minutes, the above will suddenly happen, and I'll get booted out of the game for a connection error.
I'd say it was just my connection, but it's apparently a pretty common problem with Splatoon (to the point where I've seen it come up in Splatoon miiverse posts that surface in my plaza)