Look up Smokey Yunick's Chrysler GLH project from the 80's.
Little 4 cylinder turbo that really kicked butt and got great gas mileage to boot, and it heated the intake charge.
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I haven't entirely beat the gas guzzlers, I have a full size Jeep we tow a car trailer with that can really make you cry at the pumps!
Around town, I drive an '83 Chevy S-10 that I converted to electric drive about 10 years ago.
Stripped the drive train out of it, used all that space to hang battery racks and installed used golf cart batteries I got for free from the local golf course when they converted over to gas powered golf carts...
Use the drive motor out of an electric Cushman Job site truck that had been the corner of my local junk yard for about 10 years that nobody wanted.
Used the throttle controls from that Cushman too.
I use two solar panels and a small, home made wind generator to keep the batteries charged so besides distilled water, insurance, plates, tires and shocks (It's heavy enough to be hard on shocks!) I have no operation costs in it.
It gets about 40 miles between charges with no loads, and even loaded down with more than a ton of rock it still gets about 25 miles between charges.
This is NOT some super efficient Hybrid, or super efficient AC motor that has regenerative braking, it's just a DC motor driven from batteries and uses the regular friction brakes to slow it down....
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The biggest 'Gas Guzzlers' I know of are the big Pickups, they are FAR WORSE on fuel mileage than the Hummer, which is nothing more than a Chevy Tahoe with an ugly body on it.
I think some of the little older VW pickups with the diesel engines in them would be GREAT for a 'Utility' vehicle!
Run them on about anything that will burn since the VW diesel was sequential mechanical pump with poppet injectors like the early Mercedes engines were.
If I were looking into another electric conversion, it would be a front wheel drive vehicle.
The rear differential/motor arrangment gets in the way of very good battery storage areas, and keeping the motor up front would be a good way to keep all the electronics in one place.
Tilt bed for dumping stuff, and for servicing the batteries is a VERY good idea, and once the exhaust, fuel tanks, and all the other crap is cleaned out from under the cab and bed, there is PLENTY of battery storage room!