The E72 is 2G & 3G. Unlikely to work in USA.
GSM Arena shows 20 4G-capable phones with QWERTY keyboards:
www.gsmarena.com
All are discontinued models. Physical QWERTY keyboards are pretty much non-existent these days, other than maybe that Unihertz model mentioned above.
As always, be careful of phones with batteries that aren't consumer-replacable. Most may be old enough that the battery also couldn't be replaced by phone repair places.
All of those are also "smart" to some degree. And would need to be locked down, given your statements above.
You'd also need to find one of those that supports VoLTE (voice over 4G). Some early 4G phones needed to drop back to 2G or 3G for phone calls, and you don't want that.