Front mount spare tire carriers
Long ago, my grandfather bought a 1977 Blazer. After a couple of years he relocated the spare tire, which was then carried inside the rear cargo area, to a spare tire carrier in front of the grille.
No one seems to make these sorts of setups any more and I suppose that given the fact that factory SUVs and pickups alike increasingly mount the spare between the frame rails underneath the rear cargo area, this isn't as compelling a problem as it once was.
Obviously cooling air would be obstructed which would be one disadvantage.
The advantage is that balance is improved when towing a trailer, and the rear deck area is freed up for a fuel tank or generator.
I've seen some front receiver mount setups that could be combined with a tire carrier but these seem unlikely to be satisfactory. Play would be the main problem.