Decentralised blind leader election
You just want to pick a leader so that only the leader knows? Do you need it to.be at random? By votes?
If you only want to pick a leader at random. Each party picks a large random number and a random index of a party.  Using multi party computation we output the random number matching the modular sum of the indices.
Whoever recognizes his number is the leader. The others just get another random number not their own.