Tire(S) for my Ram

Separated tire. Use a plug only if you are in the middle if nowhere and you can't make it somewhere to fix it correctly. Then replace the tire.
If the tires are the original it is time due to age to start shopping for new ones. The P in the tire size indicates a Passenger tire, not a 10 ply "E" rated tire.
None of the tires you are looking at are in the load range you asked for.
The BFG is a "C" 6 ply rated, the rest are standard load tires.