This question is probably better answered in hindsight. It's probably easier to look back and see who was the top insightful thinkers of their era throughout history. Some of the top thinkers of today might be having their ideas dismissed and will be found out later to have just been ahead of the time. But to take a guess I would say people like obviously Albert Einstein, Elon Musk, Vaclav Smil, Stephen Hawking, maybe people like JRR Tolkien, George Orwell, Jordan Peterson (before his chemical lobotomy), Tony Robbins purely from fame and attention. There's probably people who are much more insightful thinkers that no one has even heard of. Heck it could be someone totally unknown who just reads books and ponders things all the time.