Vegan

I have a stainless steel pan which works great to fry most veggies, but I can't manage to cook tofu, tempeh and meat alternatives in it. They just stick too much, no matter how much oil and patience I try. Then I have a non-stick pan which is kinda old and it needs to be replaced.

What do you use? I think about getting a cast iron or carbon steel pan, but I don't know how well it will work and if it's worth it...