Tamales sound really fun, they're certainly elaborate cause you have to wrap each one. I'm not sure they look the way I hoped so I wonder if there's a way to spruce them up and make them more dramatic.
You could try mixing some inclusions into the masa (such as fine diced peppers since they're colorful, for color and some zip) and then maybe doing something decorative with the husks themselves. Like cutting a design into an outer husk for the purpose of decorative wrapping. Obviously the actual husk they're being steamed in needs to stay intact, however if you utilize both fresh green and dried husks that would give you a natural color difference to be able to "decorate" with, and fresh husks are fine to use. I always steam in fresh husks rather than buy dried.
When I was vegetarian I ate a ton of Mexican food, as it lends itself well to substitutions since many of the recipes take into account of seasonality and personal preferences.