Garen
Given the recent spotlight that Garen has gotten and the consensus that he is not good, i have been thinking about what can be done to help him and it requires a bit of rework.
First off his spin doesnt really feel like it belongs in the current league. Instead it should be a 3 pass sqing such as is displayed in the cinematic he was shown in (a twist of fate). He could have a silence with the final slam, or maybe a small cone of damage.
His defensive ability can remain, but put his passive on it, but onlynworkd after he has activated it. (Think gp orange, but instead of instant heal its a 2 second regen).
Remove his q, instead give him an ability similar to a micro version of old poppy ult. He targets an opponent, ges a move speed bonus moving toward them and is immune to damage and cc for .5 seconds. His target can damage and cc him during this duration.
Finalize his kit with a passive thay gives him additional mr based on his missing hralth.
This wouldnt fix all of his problems but would give him play potential while keepung him very much a juggernaut.