The 'right answer' is going to be Paxos and it's many flavors; a few references to Lamport, Google's Chubby, "Paxos Made Real". If the right people are on hn today you're going to get a few references ZAB (Zookeeper Atomic Broadcast) and View-Stampted Replication. Oh, and go watch all of Heidi Howard's talks.
The problem spaces of byzantine and non-byzantine consensus are far enough apart ... well kinda like Atomicity in postgres and atomics is C++. You decide if that's a lot.
But like I said, I also think that as a class of problems — byzantine consensus is just super different from the normal consensus problems paxos and raft are addressing. Way more than they might seem at first. Enough to be an off-topic to the point of just being naive or misleading.
to give an obvious answer, blockchains are one of the methods used for trustless consensus (imagine how things could go wrong in RAFT's case if the leader was malicious)