There are so many to choose from, really. Why not try renting one and trying it out for a week? Many F450's with multiple slides have a very small payload, especially if they are 28 feet long or more.
What's your price marker? Your bed needs? Some just have a dinette, some just a couch, others have both... some have an overhead bed, some don't.
Then there are Super C's too on heavy chassis. If you put in more of what you want, you might get some suggestions.
Mike
2012 Winnebago Impulse Silver 26QP
2005 16.6 Double Eagle
2018 Jeep Wrangler JK
previously Snowbird Campers,
Triple E Motorhome and Fifth Wheel