Kirk also placed 9th at a large regional (national?) tournament, only to get overlooked because it was just 1 single event. Before they stopped really using Ike or playing, Kirk, Renegade, Rykoshet, Silven(?) used to do quite well. Ike heavily declined in the period in time where they all were quitting or using Snake.
Me and Mr. Doom are probably best placing at the moment, followed by others who just happen to be in very strong regions such as theboredone, Red-X, Ryo(Florida), and Kimchi(who recently quit), along with people who use him as a pocket secondary and main better characters (takeover and infern?). That's all I have for offline tournaments. There are plenty of decent players with potential that just go to few to no offline tournaments, and Ike is very rarely used, anyways.
Even Slaps, an unranked player from Texas, used Ike and beat Hylian's Ice Climbers in a money match. This person also beat Hylian in bracket before. There are also other tales from other sets (Brett taking gnes to game 3, Mr. Doom vs UTD Zac and Dojo)
This is only for the U.S. We have seen things from the likes of Rydle from Spain as well as a few from Japan, Selcia and Abyss I think, also. Just trying to say that there still are other players who use him or used to use him and achieved some lasting success, and that whatever I'm doing to place well can be accomplished by someone else, too.