I have heard that NEO is one of them but I'm curious to know who else could challenge them in that regard.
Recently I was doing a research on potential Blockchains and I came up with the following findings which might be very helpful to us to have a deeper study of them. Below are potential blockchain projects and can be updated as we discover more.
1.Bitcoin Blockchain
2. Ethereum Blockchain
3.Neo Blockchain
4.Cardano Blockchain
5. Chia. Network Blockchain
6. Eos Blockchain
7.Bytom Blockchain
Your extensive research on blockchain technology is an interesting one, we will take time to go through them so as to reap the potential benefits of these live projects. I really appreciate your painstaking efforts sir. Thanks