No need to argue since ETH remains at number two next to Bitcoin and Ethereum doing better to its business werein ICO are still trusted Ethereum for their exchange although ripple were growing strong and threatening to overtake the second spot .
in my opinion the ranking has no influence, because what the influential is the most widely used for ICO to determine the king of ICO and until now in my opinion Ethereum is the most widely used for ICO, thus making Ethereum the current king of ICO.
it's not the king of ico and i don't know about what's the meaning of that words. But afaik it has a very simple blockchain that easy to be combined with anything.