Just a simple proposal. I think it would make sense for a decentralized exchange to have as many privacy coins on it as possible. The only two I know of off the top are Monero and Zcash, but here are the Top Privacy Tokens by Market Capitalization:
https://coinmarketcap.com/view/privacy/
There's many of them. I would say maybe list the top ten on the dex but I'll leave that up to the community to vote on.