Just get anything that does not have leather seats, steering wheel, and shift knob. If you're getting a higher end luxury vehicle, you also have to be on the lookout for leather trim on the dash and doors. But why get a pretentious luxury car for a huge amount of money when you can buy something that has 98% of the function and 85% of the comfort for less than 2/3 of the price? Donate the difference to a vegan cause.
Eliminating all leather is the best you can do. Many manufacturers have fallen in love with leather on the steering wheel in recent years, so only the base trim of a lot of models can be had without any leather. Don't worry about rubber, fluids, or steel. It's a losing battle and it will drive you crazy.
I'm glad I was able to find something I liked that I was able to get with a sunroof and no leather. It wasn't easy to find.