Garens! a Crazy Moster! of the top lane!!!
> SHREDS ARMOR
Garen on his e does this
"Enemy champions hit 4 times have their armor reduced by 25% for 6 seconds. Hits after the 4th refresh the duration of the debuff"
once Garen picks up a Black Cleaver and does this 
"reducing their armor by 5% for 6 seconds, stacking up to 6 times for a maximum of 30%"
both of these stack with each other thats 55% armor reduction after he pick up one item his q silences a target for 1 second making them unable to move out of his e that reduces your armor by every tick and on top of that black cleaver works with his e too after that he smite you with his ultimate that does does 28% of missing health as dmg on top of a base magic dmg of 175 thats at level 6
> TOO DAMN TANKY
Garen has a base hp at lvl 1 of 616 hp you get a dorans blade 50hp that adds up to 699 add the mastery veterans scars that adds 50hp it moves up to 749 hp lvl 1 thats not including if they add any runes on top of that
> GAREN'S CRAZY STATS
Garens base AD is 58 compare that to a squishy champ like riven who has a base AD of 56 Garens base hp regen 7.84 rivens is 5.34
> CONCLUSION
garen has a massive amout of dmg with his armor shreding abilities he can reduce the dmg "Garen permanently gains 0.25 bonus armor and bonus magic resistance every time he kills an enemy unit, up to a maximum of 30 bonus resistances." Garen has crazy health regen and destroys and other top laner with his silence that wont let you do anything for 1 sec by that time your armor is gone and you have to flee something has to be done about him hes to powerful hes super tanky and can shred armor like no other champion in the game has a execution that will one shot you when you are at half hp if your the villain hes not fair hes too powerful 
All info found on http://leagueoflegends.wikia.com/wiki/League_of_Legends_Wiki search of champs items anything else to see this is all true