One fun example involves Apex Altisaur and Outmuscle
There does exist complexity in deck building, but mostly because competitive decks run very few Pokmon (if they center around Basic Pokmon) or very few Energy cards (if they center around a lock)
Some, however, used a cosmos holofoil pattern, which is especially desirable
The hard part is knowing which cards are worth listing on their own, what they should sell for, and how to ship a thin piece of cardboard (not trying to be disrespectful) so it arrives in one piece
Sure, not as many as enchantments, but it was enough that it was something players could build around
If you want more stuff like this, maybe breaking down winning Duel Links decks and such, let me know!