Good luck with whatever you settle on!
I don't know what the total BTU/hr would be on any of the ranges you might get, or the length of the pipe run, but the plumber who ran the lines to mine, back in '83, used 1" pipes (two of them, since there are two gas inputs on mine), and the maximum BTU/hr on the main side would be 158,000. He said that 50 feet would carry well over 200k, and mine was under 30 feet, but 2 turns, so that was good. This discussion pipe size brought this to mind, so I looked this up, and found that pipes actually had more BTU/hr capacity for propane, than the same pipe carrying NG. So that 1/2" may be sufficient, even with high heat burners and one oven, depending on the length of the run. You've probably seen this, or another chart, but here is one I found, that shows different charts for copper tubing.
https://www.engineeringtoolbox.com/propane-gas-pipe-sizing-d_827.html