We've owned four motorhomes, both Class B and C. I strongly suggest you avoid anything built on a Mercedes Benz Sprinter chassis. The issue is not the quality; but the maintenance. Like everything, a Sprinter needs routine maintenance and is subject to breakdown or other issue. When that happens, you'll be forced to bring it to an "authorized" MB Sprinter repair facility (dealership), whenever (IF ever) they can fit you in. Everything about the engine and drivetrain is proprietary, so don't be fooled by a repair facility that tells you they can fix it. I know of only two non-MB facilities in the country that can perform maintenance/repairs on a Sprinter.
Such is my ten years of experience with our 2014 seldom-used Roadtrek CS Adventurous.
Sorry, but this is straight BS. I have owned a 2017 Sprinter as a work van and have had several non-MB facilities work on it. Just this past Monday I had the AC condenser replaced by my local shop, and they even got the part and finished the job the same day. People like to hate on Sprinters simply because they are diesels, and therefore operate on some sort of mystery voodoo. Just understand what you are buying, and how to take care of it.
As for an RV company I am looking at for 2024, I have my eyes on the Coachmen Galleria 24A. I like that Coachmen insulates there builds, and offer a ton of options (not just a couple of interior color schemes). Bathrooms have doors, and while they are a "wet" bath, you don't have to use the shower if you don't want to. Build quality is decent for a mass-produced product, but nowhere near custom builds like Sportsmobile or Advanced RV. A fully loaded Galleria can run MSRP up in the $230k, but that is for a pretty nicely set up rig. I think more basic option layouts do run in the $165k range.
As far as finding a mass-produced RV without propane, I think that might be difficult for the heating system. You might need to do some research to see how builders are fueling their heaters, whether it be propane (most popular), diesel (if you want to argue about Sprinters some more), or gasoline, which is not a popular option just for technical reasons.
I will also put my vote in for renting before you buy. We have rented five times now, and dialed into EXACTLY what we want (well, at least about 90% there). More importantly, you get to experience build quality and equipment functionality up close and personal. Just be prepared for things to go wrong on your trips, because rental units get abused pretty hard, and stuff is almost always broken.