"Bishops, Elders and Pastors" of WHICH churches? How could there be these "Bishops, Elders and Pastors" of said churches when you don't even know what are these "said churches"? What and where is the church of Ephesus today? Of Smyrna? Pergamus?
I said they "could be man" in a sarcastic sense, limited to the "historical interpretation" of the seven churches, that ONLY IF they are those particular seven assemblies in first century Asia minor, nothing more; however, if they are also seven archetypes of churches, not just singular, particular historical churches, which you seem to agree, then how can you narrow down "angel" to one singular, particular leader for a whole archetype of churches? How could "Bishops, Elders and Pastors" of those original seven churches still be around when those seven churches no longer exist? It's just common sense that they must be angelic beings that last forever, and these angelic beings are identified with their characterization - loveless, persecuted, compromised, corrupt, (spiritually) dormant, faithful, lukewarm.