DOGE is the first MEME coin was launched on the market in 2023 if i'm not wrong, It’s still so popular coin and if you asking biggest MEME coin then of course it will DOGE coin because it’s top 9th rank coin on Coinmarketcap, and total market capitalization is around 12 billion dollars and daily trading volume is over 500 million USD, So based on all calculation it’s a biggest MEME coin in the market.
So far, Doge is still the one who rules and is the main meme. Doge was the first to be a pioneer. even the many meme coins because Doge rose in price. we can see it on CMC, it has largest trading volume and market cap. You are right. other meme coins are only following what the success of Doge. while Doge has tried their efforts really from zero, they had hard time and then in 2021, Doge becomes really skyrocketing that emerged so many meme coins these days. Following Doge, Shiba Inu is number two I think. But, once more, investing in meme coin is exactly high risks, moreover, the new meme coins. watch out of any their high promises.