Ah so now you choose to change your goalposts? You said "A normal boss". I linked you to someone who is known for doing something that few people are capable of.
Now feel free to move your goalposts by all means but well I gave you exactly what you asked for and hell better in this situation.
Oh wait I showed you someone soloing a boss. So even better than two people. So yes it does relate when I showed you something considerably better.Show me two people killing another boss in normal and that can be your thread.
Also Eonar mobs are not bosses. They are trash packs that hit like wet noodles. So if anything your 2 man actually holds less weight than a solo of a boss from two previous tiers. If you really want to say the bats, demolisher or copypasted Legion mobs are anything close to a boss then that's just brilliant.
So actually it can be compared better because you and your friend killed what are essentially the equivalent of trash packs. Now I'm not denying that Eonar is undertuned god no. All of Normal is. But you asked for a Normal 2 man and I provided you with something better.
Again feel free to move your goalposts but well I don't really need to do any more as I adhered to what you asked.