Bronze:
Pantheon has a win rate 49.86% for Bronze players whilst the very best Pantheon's are earning a win rate of 59.58% with the average rank of these top players being in Diamond IV.
LoLalytics ranks Pantheon at 39 amongst all champions earning a tier grade of Platinum.
This ranking takes into account the win rate of Bronze players, the pick/ban influence of Pantheon, the win rate and average rank of the best Pantheon players.
and gold
Pantheon has a win rate 51.64% for Gold players whilst the very best Pantheon's are earning a win rate of 59.58% with the average rank of these top players being in Diamond IV.
LoLalytics ranks Pantheon at 13 amongst all champions earning a tier grade of Master.
This ranking takes into account the win rate of Gold players, the pick/ban influence of Pantheon, the win rate and average rank of the best Pantheon players.
Now lets look at Yas:
Bronze:
Yasuo has a win rate 52.08% for Bronze players whilst the very best Yasuo's are earning a win rate of 57.04% with the average rank of these top players being in Diamond II.
LoLalytics ranks Yasuo at 6 amongst all champions earning a tier grade of Challenger.
This ranking takes into account the win rate of Bronze players, the pick/ban influence of Yasuo, the win rate and average rank of the best Yasuo players.
Gold: Yasuo has a win rate 50.37% for Gold players whilst the very best Yasuo's are earning a win rate of 57.04% with the average rank of these top players being in Diamond II.
LoLalytics ranks Yasuo at 24 amongst all champions earning a tier grade of Diamond.
This ranking takes into account the win rate of Gold players, the pick/ban influence of Yasuo, the win rate and average rank of the best Yasuo players.
And diamond
Yasuo has a win rate 49.80% for Diamond+ players whilst the very best Yasuo's are earning a win rate of 57.04% with the average rank of these top players being in Diamond II.
LoLalytics ranks Yasuo at 57 amongst all champions earning a tier grade of Platinum.
This ranking takes into account the win rate of Diamond+ players, the pick/ban influence of Yasuo, the win rate and average rank of the best Yasuo players.
Even high elo yi players are apparently only getting 54% winrates at lower elos so I'm pretty sure how much he stomps is way over hyped he's not even ranked high at all in low elo sorry for the long post