I love Gnar, I mained gnar for about the entire S6 preseason and a little earlier and I fully expected that he would carry me to Gold and higher, however these past few months have shown me that he is not in the best spot in the world. Champions like Riven Tahm Kench, Pantheon, and a few others take serious advantage of Gnar's early game weaknesses before lvl 6 and before you get your Cleaver and tank items. he is also very reliant on your team going even as his Mega form ultimate, even if you get the best 5 man ult into a wall and lock them down for forever, if the rest of your team either 1. doesn't go in with you, or 2. doesn't have the dmg to take advantage of your let, then your screwed.
All this being said, out of the 3 I prefer Gnar, but if I could give some other Meta champs that can carry pretty well as alternatives for Jhin and Zed i would suggest
