Great post-apocalyptic novels?

Hi all.

Recently I finished reading Nevil Shute’s “On the Beach”, followed by Walter Miller’s “A Canticle for Leibowitz”, both absolutely superb books.

I was hoping to get recommendations from the community on other, highly-esteemed science fiction books revolving around nuclear post-apocalyptia. I’ve read Ellison’s “A Boy and His Dog” but found it a bit too crass, and have started McCarthy’s “The Road” but so far have found it bleak and uninteresting, lacking in any philosophical reflection.

Any suggestions would be very welcome.