Do you think that Haydn is underrated as a composer?

Know the name but can’t say I can think of any specific compositions so maybe yes?

See, that’s what I mean. I bet if you listen to some of these, you will recognize the melodies

Certainly lovely.

He is certainly not underrated by those devoted to classical music. Nor by classical musicians.

Underrated by popular culture, sure, especially in the land of the mostly ignorant and tasteless.

hard judgement (but accurate)

I took lots of music history in school and my parents listened to classical music while I was growing up, and subsequently, I became a great lover of classical music. So to me Haydn is a household name, much like Bach, Beethoven, and Mozart.