Thank you for your comment, @user3154, I’m happy that you loved the concept!
I see that our Social Feed widget would be just a thing for you, since it supports both Facebook and Instagram sources. We haven’t integrated LinkedIn there yet, but we’re planning to 
By the way, you can vote for this request to get notified upon the release: Linkedin Integration
At the moment you need two widgets to support your use case (Social Feed and LinkedIn Feed).