Zero jeans or pants. You cannot ask about comfort online as that's a personal metric. I could also recommend black licorice as a tasty treat and since its a personal metric, you'll hate on my because you think the black licorice taste sucks.

This is BIFL where longevity rules. If you want comfort, you need to wear pajama pants 24/7.

The question you want to ask is what are the hardiest jeans? Those are jeans of the heaviest denim you can find/afford. Denim comes in weights by weight of a yard of fabric. Heavyweight jeans are 16 ounces and up. Get some. And don't fall for marketing as there's a deep pool of hipster bullshit with heavyweight jeans.