If we're speaking about the best marketplaces for NFTs, I would suggest paying attention to OpenSea, Rarible, SuperRare, Nifty Gateway, Mintable, Enjin, etc. Well, overall, I would just recommend reading this article where all the info about the most popular NFT marketplaces is gathered, including accepted cryptocurrencies, supported wallets, royalties, and other stuff:
Select the Best NFT Marketplace for You:
https://icoda.io/blog/select-the-best-nft-art-marketplace-for-you/It's especially useful if you're a creator and looking for the best options.