For me, it has to be Leuchtturn1917's 120g/m³. Also like Rhodia, though it's a bit thin for my preference. Happy to hear you guys' suggestions for a slightly heavier (let's say 100g/m³ and above) paper, either loose leaf or in a notebook.
Leuchtturm1917 for me. 80gsm also. And Midori/Traveler's notebook paper. I forgot if that's the same as the Tomoe River Paper. Those are my favourites