Seriously, post 3 replays of you beating OKW, while killing a Tiger/Panther with your Jacksons - Automatch, hopefully a reasonably high rank.
I'm really trying to help you here, anyway let me search the vault.
http://www.coh2.org/replay/27578/against-turtle-okw
This one is pretty good, it's against a true bunkered in OKW, when you see the play you just know OKW is just stalling for KT giving you enough time for counters. You can see when the KT arrives I have a Jackson, which scares away the KT everytime, when I have 2 it can't even come close anymore. (jumped up to rank 60 with this one)
http://www.coh2.org/replay/27579/1-jackson-vs-3-tigers
This one is really late game, 1 Jackson killing 3 charging tigers in a large open map, enjoy.
Yes, I say it again, 1 jackson vs 3 tigers. (was rank 180 with this one I think)
http://www.coh2.org/replay/27581/research-tough-game
This one is against Stephen, though he played better and should have won the game, he kinda made the mistake of building 2 panthers when they're not really good against inf. Anyway 1 jackson killing 2 panthers. Such a hectic game, could not keep up with the micro at all!
As a bonus
http://www.coh2.org/replay/27582/counter-to-counter
Against the number 5 of 2 vs 2, staying 1 step ahead of your opponent. Keeping your US army alive really matters. My partner at that game took on tigers with 2 jacksons, really great game.
No offense to any of these people, they really played great, I just wanted to show you that you can win as US, you just need to figure out counters.