Hello adaccounting,
It sounds like you've already done a fair bit of research into what integrations are possible to pair with QuickBooks Online, which is great! The QuickBooks Community is a great resource for brainstorming with other users about the integrations they're using to optimize their workflow. I just wanted to take a moment to highlight another way you can look for apps that work with QuickBooks Online.
In addition to third-party integrations handled outside of QuickBooks Online, the program also includes the Apps tab, where you can research partner applications that link other services to QuickBooks Online so you can sync data and view it in different ways. Feel free to check out that tab, use keywords to search, and click the apps available to see reviews, details, and contact information for the app team if you have questions about it.
If you are already familiar with the Apps tab, that's awesome. I see you've already got one suggestion here on the thread, and you may get others still from other users. Wishing you the best with your search!