So, I main Zed, and I love when enemy junglers choose to gank my lane when I have poked down my opposing laner to around ten percent. It allows me to bait a 2v1 and win it nearly every time provided I'm six. So after plenty of times doing things like this seeing as I've played Zed quite a bit now, it got me thinking. What champion EXCELS at turning ganks around? I'd love to hear everyone's thoughts. Thanks. :)
Renekton was the original "Don't gank my lane when we're both not full cuz it'll give him a double'. Riven's decent at it. Cho can if he has ult up. Any ADC with outplayability[Vayne, Ez, things like that] if they're ahead or late game. Cassiopeia.
I'm sure there are more but that's just what comes to mind.
As a Master Yi Mid player, I'm biased on the subject: Master Yi (and Fizz for soon to be obvious reasons).
The trick to laning as Master Yi Mid is to recognize your enemy's engage potential and predict/react to it with Alpha Strike. A simple example is a champion like Ahri. If she burns her Q to farm the minion wave but misses hitting me, or if she fires her E at me to try to initiate a straight up fight, that's the perfect time to Alpha Strike to her, as without either of those skills (Q for damage and E for lockdown), her engage potential falls off hard. If you take this concept even further however, you can potentially completely turn around ganks by negating multiple champions' engage potentials at once. Whether it be elaborate sidesteps, noticing if they use their abilities at the same time and Alpha Striking to negate the multiple abilities, or a combination of both with a few other tricks (Meditate op), the temporary invincibility that Alpha Strike grants allows for easy turnarounds in terms of negating damage. Not to mention most Junglers are surprisingly squishy early game; Alpha Striking to them and wailing away with auto attacks can easily lead to a quick death.
In fact, I'm quite sure you've done exactly what I've described with Zed. Zed goes untargetable for a short time when he uses his ult, similar to Master Yi's Alpha Strike. This means that if you're smart about negating a champion's engage potential, you can easily turn around ganks by negating the enemy duo's burst, and then assassinating the squishier of the two (or even both of them if you do great).
Maokai can turn most ganks provided hes lvl6 and has the mana, it really depends on the match up of your lane opponent and the enemy jng pick.
This asshole 
all you need is 
dont gank without checking his stacks
most Nasus already have the capability to wreck 2 people, they just dont bother to so you never know how big of a threat they really are
with tons and tons of shrooms everywhere. Just try to gank him lol.
I'd say 
the sustain and early dps is ridiculous. another strong champion is 
who works best in 2v1 situations.
Obviously depending on the jungler and opposing midlaner, Malzahar is a good turnaround guy for me, especially after six. On even basis, it's very easy to drop a combo underfoot and lay on the Grasp for a good finisher. Sometimes nets a clean double, if they dive for it. And surprisingly, it's still hard for me to find enemy laners building QSS.
Thanks guys, I'm not necessarily going to be changing mains, but I love talking about these kinds of things, hearing new opinions. By the way the reason I love Zed is because once he gets snowballing it's really easy to 1v3 people. You focus the tank first with your ult, provided you have lifesteal items like bork, blow everything on the tank until you're positive your ult will kill them then you fly around the map lifestealing off the squishies until they die. The only thing that can stop a fed Zed who knows how to do things like this is hard cc and coordination. Thats why I love him. I know it sounds retarded to focus the tanks with your ult, but.. trust me, it works stupidly well. A fed Zed doesn't need to use his ult on squishies in fights like that. Zed actually poops on tanks with 
and 
not to mention if you stack that with 
. It's just so easy to kill tanks with the passive from bork combined with the massive aa speed steroid from youmoos, and last whisperer so your aa's and spells do more against armor. But all those things stacked with your ult against tanks just demolishes people. Then once you kill the tanks usually the squishies can't peel for themselves and are f'ed provided you have enough mobility and lifesteal to duel them. I've been able to 1v4 people like that, its extremely fun. Anyway, thats just why I like Zed. :)
As a support main, I love playing Janna and Lulu to turn ganks around. Both excel at peeling and keeping people alive.
I honestly believe 
is the best at reversing ganks. Even when two people come up to him, he can just Ult+W and bammmm
