Philip K. Dick is sui genres, a class by himself: Ubik, Flow my Tears, the Policeman Said, The Man in the High Tower, Do Androids Dream of Electric Sheep?, Radio Free Albemuth, etc. All great. all unique.

Yes to Poul Anderson. Fredrick Pohl's A Plague of Pythons was the first real Sci Fi novel I read and it hooked me! I didn't know people could think that way! I had read The Time Machine and Edgar Rice Burroughs' John Carter, Manhunter from Mars stories before but really didn't consider that there was an entire genre out there. I was very young.

H.P. Lovecraft, I have never read. Alas. I'll put that on my "To Do" list. (The cover art was a little off-putting.)