I respect the work of Robert Sapolsky. His interdisciplinary approach including and mixing neurobiology, primatology, and stress physiology, presents a more comprehensive understanding of human behavior, instead of just focusing on one area. Brains are too complex for that. Some find his views on free will controversial, but they actually bring up an important conversation about the influence of our biology on our actions and decisions.

Neuroscientificually Challenged is good, Andrew Huberman goes very in-depth with stuff, but is too big on the motivational part of it rather than the actual science.

Not exactly a famous scientist, but I reached out to Justin from Thought Emporium (also on YouTube, focuses more on Biology as a whole) very recently about his white paper on his neuron-growing experiment. Really interesting stuff. I’ll report back if I ever hear from him.