Yes. @UNC Rubicon has the ARB compressor under his passenger seat, so I know it can be done.Thanks for the replies love the tackle box converted for meds and charging. I swear I saw an arb air compressor under the passengers somewhere. I guess I should of looked at the space closer.
You need to be careful with the back seats since they fold down, you smash whatever is under there when it does... I killed an ARB tire repair kit box like that...I use Bestop RoughRider Underseat Organizer (https://www.bestop.com/jeep/2018/wrangler-jl/underseat-organizer/door/4/).
They mainly showcase it as backseat storage, but it works in both location. You have to remove the side plastic piece that keep the shape, otherwise it does not fit.
I would not recommend this for the backseat, as there are better option out there, but it's fine for the front seat if your are not looking for a secured option.
Side note: The passenger side has a sensor that can get triggered if the bag is full.