Lee, I listened again just now to the end of the 5th and I agree with your assessment. It’s got to be my favorite because the end is so triumphant — as you say with “angry joy”.
What’s remarkable about the piece is you never know when it’s going to end. Suddenly Beethoven shifts to soft music, then builds up the fortissimo again. The tension he builds up and releases is the same feeling you get when you’re working hard and feeling the toil. Then suddenly you make a sale!
You have found the essence of that piece, with it’s many constructions of Coda.