Classics in general is going to produce a list so long you'd spend your entire life and three more besides trying to get through it.
There are some ready-made lists out there, btw. Search for hundred best novels, hundred best fantasy novels, ... heck, hundred best of anything ... and you'll be off and running. That's where I began for my own reading list. I cull and add every few months, and have done for past couple of decades. (as a side benefit, I indicate which ones I've not read; this becomes a birthday shopping list for when my kids don't know what to buy me; physical books only, and must be signed by them; I have a whole shelf).
There are some ready-made lists out there, btw. Search for hundred best novels, hundred best fantasy novels, ... heck, hundred best of anything ... and you'll be off and running. That's where I began for my own reading list. I cull and add every few months, and have done for past couple of decades. (as a side benefit, I indicate which ones I've not read; this becomes a birthday shopping list for when my kids don't know what to buy me; physical books only, and must be signed by them; I have a whole shelf).