Grant vs light Panzer = ok
Matilda vs light Panzer = ok.
Old shermie vs light panzer = ok.
Light panzer in general = ok
None of which are MA meterial. Just for early war, and that's still far away from having the needed set of aircraft,- after all AH is mainly a flight sim...
Churchill...well, it would be slow and so on, but sporting some various arms, maybe interesting, as well as being somewhat thick skinned. It's finest quality would not show in AH...it was apparently rough terrain.
BTW, LVT will absolutely outmaneuver the Sherman on soft soil or sand. Seen it with my bare eyes! Where LVT goes, Shermie is stuck. And AFAIK the Shermie was not that bad...