Old Avengers Commission
I said in my Avengers: Age of Ultron piece that I wished that I drew heavier outlines around each character so I can distinguish each person when showing the Avengers as a group. I dug around my old files and I found an old commission piece that I did and it looks like I took my advice.
Notice the bold outlines around each character so you can tell who is who and avoided everybody blending in together.