Not my role to choose the aesthetics of your living room

But for me, I quite like:
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Le Corbusier LC3. A lot of replicas are available. Be careful with those, you don't want the foam cushions to be too soft otherwise you will sink into them. I have sat in a real one (or at least the owner claimed that it was). The problem with this sofa is that the person in the middle sinks between the cushions, so you make sure you choose carefully.
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The other one I liked before I sat in one is the Barcelona sofa. The foam was a bit too hard, and there is a disconcerting springiness from the metal legs.