Peter Suderman asks, Is Robert Heinlein Our Best Pulp Novelist? I suppose this hinges on what you mean by "best," but it seems like Heinlein is probably at the front of any list. Form Isaac Asimov's memoir in regards to Heinlein:
...From the moment his first story appeared, an awed science fiction world accepted him as the best science fiction writer in existence, and he held that post throughout his life. Certainly, I was impressed. I was among the very first to write letters of praise for him to the magazines.