Vitalik no doubt has contributed a lot to the crypto-verse and that also very early when no one was really into cryptocurrencies, but he definitely can't be said second to Satoshi, number 1 is number 1 because of the all-new technology that Satoshi brought in which was really impossible for anyone to think, others are just adding on their inputs on a technology that know is common, If we see that way even Ethereum has so many problems and coins like SOLANA are trying to solve that issue thus making a better blockchain so ideally, they should be on number 2, also other people who might not be active in blockchain development but have ensured the existence of this community can be said to be number 2 also.