I strongly recommend you take not just your bass, but all of your "worst case scenario" gear with you when you go car shopping.
...
It isn't about the amount of space, but how it is configured. ...
I purchased a Volkswagen Golf Wagon. ...
you can get a bass in almost every vehicle, but that might not be your only requirement. ...
Have fun shopping.
+1
You HAVE to take your gear with you while shopping. Here's why...
There are cars out there that technically, on paper, have a bigger cargo area than brand/model X, but are no good (for my needs, maybe yours). I shopped extensively, with bass in tow...
For example the Volvno station wagon with all its space was hampered by a retractable cargo cover that couldn't be removed. Fold down the back seat and the cargo net/cover thingy is still cutting the space in half right in the way of the DB.

Missedyoubici had fold up seats that fold up in the way not a problem if you're only loading a few sheets of plywood, but a big problem if those sheets of plywood have already been formed into the shape of a bass.
The Alphabeta Romeo Wherefore Art Thou Room? was a cool hot hatch but the irregular shaped hatch opening meant getting the bass in and out was a total hassle and the available space was as misshapen as the hatch no problem for soft goods, like your gig clothes might stuff into a corner.
Anyway, as mentioned, just about any car will take a bass, but while Mr Warburton once used to stuff his bass into a VW beetle (trad aircooled), how small and hassle free do you want/need to be?
After decades without a car, I wound up being in the difficult position to need one. I wanted the smallest, most fuel efficient, that would meet-my-needs vehicle. I tried out dozens of models including ones that I knew in advance were out of my budget and or criteria. Came down to the Honda Jazz/Fit as it was the best for interior cargo space, but the options in HK meant getting a gutless engine mated to an automatic tranny... meh. Where's the standard stick with bigger turbo engine?
Oh, and MikeCanada, nice car you chose! I'm just a little jealous.