While we're at it, also keystones! but yeah i like this idea a lot.
You forgot Sion (his stacking health bonus passive on W).
And kindred!
Dont forget Bard Pit
And Thresh, to add to the list of people in comments
If I might sum it up for the rest of these beautiful commenters here, don't forget Sion, Thresh, Bard, Kindred, or anyone else with an innate stack based system, if any have been forgotten.
Don't forget our favorite wizard, GAREN!
Been wanting this FOREVER.