Sasha Gusev and Alex Strudwick Young are two good follows on opposing ends of the spectrum of research beliefs here, both link constantly to new studies. From a more psychometric and behavioral perspective, Eric Turkheimer is a good starting point. On the other end of the spectrum from Turkheimer is Richard Haier.

These are, like, high-profile names, but of course there are many dozens more people actually doing work in these fields.