Best plug-ins for building tech support & a community

You can look at all the features or plug-ins, but until you actually put them into use, it's hard to see what might be the best option. So here goes:

I'm building a site for tech support for a SaaS and want to include a community where users can exchange ideas and share their wins. I would also like to have in the future a paid option that would include live AMA's, live training, and consulting. What are the best options for plug-ins? I've been looking at Paid Memberships Pro, BuddyPress, Academy LMS. I have active subscriptions to Wpmet & Elementor Pro. Just unsure which plug-ins would be best for my purpose.