By far the most humiliating man would be my Best Man at our wedding. Wouldn't you want a fiance who ****** you to accept her long-time lover as your Best Man? Imagine submissively serving your wife and your best man while they fucked each other madly for your entire wedding night. Then imagine that you spend your entire honeymoon bringing them Champagne, towels, giving them massages, getting meals, paying all the restaurant bills, driving them around. Then every evening you'd be fluffing the best man, making him hard for your wife. Can you feel the burn in your cheeks? It's a good thing service is it's own reward for a cuckold like you, because you're not going to be allowed to come for the entire honeymoon.
If you serve them well, when you get home from the honeymoon you will be rewarded. You can get on your knees, put a strap-on on your wife then offer them both your ass to have your prostrate drained while they take turns fucking you.
Now that's a way to begin a marriage. Really sets the tone for the years to come, doesn't it? Your humiliation just makes the marriage stronger.