You will not be compared to other students all over the country but to students at your school,
so how many kids would be taking the 4 AP/postAPs you’re mentioning AND APUSH?
Typically if you can handle 4 APs (or post APs) with As it means you can do the work at the most selective colleges.
You can take one more AP if you’re really into the subject but it will not make a meaningful difference in terms of admissions.
As a junior, your time is better spent developing your ECs and doing very well in your scheduled classes.
That being said, taking one AP social science senior year (such as Gov or Econ) along with 3 APs would work, too, I’d you’re worried about social science APs.