Okay, I saw Rogue One 3 times, and I feel confident I'm right but crowd sourcing info never hurts.

Chirrut Imwe and Baze Malbus, definitely untrained force sensitives, right?

Other than having insane combat skills, they're shown several times in the movie with uncanny sensing abilities.

Being able to sense Jyn in the market because of her Kyber crystal, sensing Bodhi in the cell next to theirs.

Possibly with Chirrut Imwe, but being blind causes the other senses to become more sensitive. He could have easily heard Bodhi breathing in the next cell, and I don't remember if Jyn was fiddling with her Kyber crystal right before Imwe spoke up or not.

I definitely think Imwe is force (very) sensitive, but not everyone was cut out to be a Jedi. Many started training but then were dropped, and served the order in other ways. That could be what they were, but I think Malbus was just a really skilled heavy fighter.