Wanted to make a new thread, but found out there already was one (two actually) which kind of fit the bill. I didn't specifically want to discuss the most beautiful trophy, just trophies in general. Anyway, here are some pictures of the latest GT winners holding their biggest trophies.
Vingegaard with his TDF trophy:
Hindley winning the Giro:
Evenepoel with his biggest trophy in San Juan:
There is also a race in Spain that uses something they found at some home-deco store as trophy. They once used to give a cool fish bowl, which could at least double as a salad or candy bowl, but budget cuts forced them to downsize. The decades before that, the Vuelta trophy looked mostly like something you'd like to get rid of in a yard sale.