How much will you travel and/or carry? Most 1/2 tons can easily tow LEII but you can hit payload limit depending on how you travel. If I did not have TV I’d buy F350 with 7.3 to max out payload. You do not need a diesel to tow an Oliver. Nothing wrong with them but it will take a lot of miles to cover cost delta. BTBRV is great channel for towing. He even suggests gasser when under 10,000 pounds. Whatever you get absolutely get tow package
I have F150 with max tow. Tows my LEII easily. I do not really like having to use WDH but it is needed per Ford. I have truck camper on order so actually upgrading to F350 for payload. If I wasn’t getting truck camper I’d stick with my F150.