@jack-waugh Well the whole issue with president is complicated by the electoral college, so for such hypotheticals such as this, it's probably easier to imagine some system that doesn't include the electoral college. Adapting a better voting method to presidential elections is a complex topic of its own.
But the point is, under a better election system, middle ground candidates would be more likely to run and to be elected. Political figures today that are closer to the middle include Democrats like Sinema and Manchin, and Republicans like Liz Cheney and Adam Kinzinger and Mitt Romney. John McCain was fairly in the middle (but Palin wasn't, of course). Perot was in the middle in that he appealed almost equally to both sides. Arnold Schwarzenegger is centrist by national standards, but was on the right relative to California.
None of these are centrist on all things, of course. Cheney is very conservative on most policies, she just doesn't toe the Republican line on things related to rejecting election outcomes and other things specific to the changes in the Republican party in the last few years. And none are really great examples because they are operating in a system that is biased against centrists, so they have a lot of hate directed at them (more from their own party than the opposite party).
As for Biden, that's a bit tricky. He's actually considered quite moderate. I suspect most of the hate directed at him from the right is because the country had gotten highly polarized in the few years prior.