Using New Outlook on Windows for personal email, calendar, and contact management
That is the way mine is setup. I have 4 email accounts, 2 Hotmail and 2 Gmail, setup right under my Favorites folder. They are Inbox (@Hotmail.com); Inbox (@Gmail.com); Inbox (@Gmail.com); and Inbox (xxx@Hotmail.com).
They show a blue number at the right of them with the number of new emails since I last looked at them. Just add your email accounts and the put the Inbox folder of each account under Favorites, then delete any folders under Favorites that you don't want. You now have a quick look at any new emails and the full email folders are down below them.