One of the MOST decentralized projects I know off is: Blocknet.

So I'm kind off surprised you didn't put it on your list. Blocknet is an old school project from 2014, however they are first movers on DEX developments, and their decentralized oracle service (XRouter) speaks for itself, although still in beta.

You can read more about their DEX right here, if interested: https://blockdx.com/