Err I think you misunderstood, I meant how would you rank all 4 of Rach's piano concertos plus his Rhapsody, like, best to worst (though this is Rach and a piano, worst is still miles better than a lot of composers' best).
Oh hahaha whoops, sure I’ll rank, most favorite to least:
Piano Concerto 2: Mostly love it because it was both my introduction to Rachmaninoff and one of my introductions to classical music in general. Melodies are fantastic, powerful moments.
Piano Concerto 1: A weird one to put so high on the list, but I like it. It’s dramatic, rich, reminiscent of Grieg’s concerto which was its model…not as many “popular melodies” one associates with Rach, but still good stuff.
Piano Concerto 4: Unusual, kind of jazzy, kind of Modernist, but still very much a Rach gem
Paganini Variations: some fantastic moments
Piano Concerto 3: A lot of people consider this his best work, so this might be shocking to some to see this at the bottom of my list. Nothing against it, I’ve just never really been taken in by this concerto. I like the cadenza, and I appreciate the ideas that he plays around with [Russian chant, quasi-variation,] but, I don’t know, I’ve never really enjoyed this one as much as his others.