While AlexNet was his top single contribution, both Ilya and Geoff had much more other contributions and longer lived careers so the fame is kind of self fulfilling there (both in that he doesnt seem to have wanted it but also didn't keep up publishing groundbreaking stuff).
Alec Radford is in a similar vein in that he likes to keep a low profile, but he is subjectively much more famous in AI circles because he continued to work on things like GPT2/3, DallE, CLIP, PPO, Scaling laws, RLHF beyond just dropping GPT1 and peacing out
btw i recently asked gpt this exact same question posed by op!, was quite the diplomatic response i got.
he was wrong about many DL paradigms and didn't contribute in any way to the advances that brought us LLMs for at least the last decade, but now since he won the Nobel (undeservedly imo) his wrong opinions get publicity and misinform the public and decision makers.
i think it's the mark of an intellectual to recognize when the world has moved on so far that your idea of it is outdated and wrong. he missed that mark.