Monarchs, Artisans, JAQKs, Madison players, Archangels definitely have the most aesthetically pleasing tuck boxes as well as feel/texture. In my opinion, Some decks such as the White Knuckles and Blue Bloods failed to create tuck boxes that did justice to the wonderful cards inside, which is a shame really. I know a lot of people don't care about tuck box texture/aesthetics but to me it's a huge aspect of a well designed overall deck of playing cards (Blue Bloods are an exception though because the card designs really are just THAT good).
Honourable tuck case mentions go to Smoke and Mirrors, Madison Rounders, Aurum (Gold/Laser), Luxury Crowns, and definitely Paul's upcoming Deco (White only in my opinion).