Or you can pick-up Riflemen doctrine, build 2xRE and use one or dual flamethrower.
Or, go for mechanized doctrine and use Rifleman on WC51 to harass the opponent. OKW has weak early AT.
Lol no, don't build Jackson to counter Jagt or Elef, build 4 / 5 shermans divided in two groups, infantry in the middle and flank with the Shermans, make sure you have around 100 munitions in bank to use smoke.
Since the complain is about team game, this is bad advise though. Any half-brained axis player would put two or more atgun/at infantry behind to cover the elefant, and waits for USF tank to move into killzone.
You can argue smoke, but smoke does not cover every directions, and it work both ways. It will, however, at least allow USF player to retreat from killzone, but with casualty.
The best thing USF can do is use calliope to clear out these atgun. But unfortunately, calliope is locked behind commander...