There have been several posts about other coins which claim to be privacy-centric.

Here's a good comparison of many privacy-centric coins: https://www.reddit.com/r/Monero/wiki/comparison

That page is on a Monero site, so while you may be wondering about bias (everyone has bias), ask yourself the more important question: is the information on that page true?

If it is true, then bias no longer matters. If it is not true, please show how it is not true with links supporting any claims.