Loge (Loki) and the gods (mouse over images for details), Das Rheingold by Wagner [Metropolitan Opera, USA 2010+]
After so many productions of Wagner, like Shakespeare, one of the highlights of a new production is in experiencing how creative and fabulous the costumes and production can get. This was directed by Cirque du Soleil director Robert Lepage (and it shows in the visuals!).
Loge is played by Richard Croft, who was apparently inspired by MCU!Loki in his performance after seeing the Avengers. His partner playfully compares him to MCU!Iron Man rather than Loki in looks: