"GT3 RS / R34 GTR / Supra" are not allowed, lets not be a nerd.
Ok so here me out here, assuming everything is legally in the clear. So things like engineering checks don't come into play.
Take a jeep wrangler, 1st thing we're going to do is chop it to a single cab ute with a custom ally tray and canopy setup. With the roof to tent of course. To go with that pull the big diesel V8 out of a land cruiser 200 series and throw that in mated to a fully built auto and probably the transfer case out of a 79 series with Dana 60 diffs. Throw that bad boy on 36 inch tires and the appropriate supporting suspension items. Bar work all round. And you got a vehicle more than capable of seeing the whole of the beautiful country I call home. (Edit, would probably throw a different chassis under it as well, doubt the wrangler one would be able to handle the loading. Maybe one off a 300 series ain't looked into them that much, maybe a braced 80 series chassis)
Also since we're dreaming throw a caravan on the back because why not, we ballin' out here.
Even though you said no Supra because TikTok ruined it, I'm still going to say a MK4 Supra, ever since I seen it in The Fast & The Furious I've loved it since, though the same can be said for any Jap car.
Aside from JDM's my dream car has to be an M3 E46 GTR, they're insanely clean but used primarily for Racing, or was so they're insanely expensive for what it is, on top of having to have most converted back to being road legal.