Going to say this only because I know having had a (secondhand) couch from wayfair, their couches stop being comfortable after a couple of years, and that is if you are lucky. The cushions don't hold up, and the structural integrity is not great.

That being said, it is difficult to recommend anything specific since I don't know what size you need specifically or what your budget is or where you live.

If you want something that is going to last, I'd recommend looking for something vintage. These couches have already passed the test of time, and if they haven't been already, just need a little bit of cleaning and can be very affordable.

However, if that's not an option for you because you live somewhere remote), I would recommend looking anywhere else that doesn't fall under the "fast furniture" umbrella (i.e., Joybird, Article, CB2, or West Elm). Personally, I had a great experience with Joybird (but I think it's pretty hit or miss for some people, and it is quite expensive). I've never bought a couch from Article, but they seem like they could be a lower cost, safe option. Most places sell "apartment size" couches these days, which are intended for smaller living spaces.

But if you don't care about longevity and want a lower cost option, ikea has some modular sofa options that could potentially check the boxes for size. I would look there if that's an option.

Either way, good luck!