Some quick suggestions.

For decentralization, check out IPFS or LBRY. While IPFS isn't specifically a blockchain, it does make use of blockchain for its Filecoin token which incentivizes people to contribute to the IPFS network (which, itself, offers a potentially better version of the internet in the long run). 

Meanwhile, LBRY runs off of the LBRY blockchain and allows users to upload content that's decentralized and solely under the control of the person who uploads it. It can't just be taken down arbitrarily.

And in terms of governance, that's the area where things are still developing but it's related to the concept of a DAO and the utility purposes that NFTs CAN offer. A DAO can allow decentralized and democratic governance of an app or organization. NFTs don't have to just be "owning a JPG", they can be tokens that offer an individual voting rights, among many other purposes. Again, this area is developing and far from perfect but it offers a lot of potential.

Despite that last one being a WIP, the first two are objectively ethical and important purposes that non-Bitcoin blockchains can offer, and there are many other examples as well.