I can think of one that many pianists would know immediately: the Sonata in D Hoboken XV1/37. (Had to look that number up.)
Ah yes, good point. That one has always seemed particularly Mozartean to me. It is indeed very frequently played. That one actually has never appealed to me as much and I decided not to do it, especially since I will be doing the other four late ones I mentioned in my earlier post.
f so, than that too might account for today's teachers tending to bypass these sonatas, perhaps believing that they were more of a sideline in Haydn's creative work.
Another good point. The piano sonatas, like Mozart's, IMO are vastly less important than the other Haydn works you mention, but wonderful nevertheless. Piano teachers, as you mentioned earlier, ironically do seem to love assigning Mozart sonatas, though they too are on the whole probably much less important than other of that composer's works like the operas, piano concertos, ensemble works, etc. Incidentally, I've always preferred Haydn's sonatas to Mozart's and thought the latter's were a bit overrated (besides the A and C minor).