Who should be my next R5?

Some context- i am at 6.3 of story quest right now and I don’t have many good bleed champs for the medusa boss. My other R5 so far are Quake Ghost Aegon Omega Colossus Doom and Guardian. Have 100% all the Variants except V4 which I haven’t done yet. I also dont have a R5 Cosmic champ yet. Options are
Symbiote Supreme (no dup) Stealthy (no dup) Hulkbuster (duped) Hyperion (duped) or Thing (duped)
Symbiote Supreme (no dup) Stealthy (no dup) Hulkbuster (duped) Hyperion (duped) or Thing (duped)
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