Most owners have been delegating whatever cards they happen to have, and that's a fine way of doing things as long as the accounts are playable. But we've had some owners come along wanting to construct decks from scratch, and it has been useful to be able to show them some of the decks we have already working at various levels, so they can use them as examples. I thought rather than having to pull them up in Discord conversations all the time I should put them in a post.
Silver League
Constructed silver league decks tend to have level 4 rare summoners and monsters to match, so that the account can consistently play in low Gold league, which is generally the sweet spot for rewards.
Here's a silver account constructed by @nealmcspadden: https://peakmonsters.com/@squacco-heron/collection
A more recent one from Neal, with one splinter left out: https://peakmonsters.com/@painted-stork/collection
Here's one constructed by @aggroed: https://peakmonsters.com/@glitterace/collection
Gold League
Gold league decks tend to have level 6 rare summoners and monsters to match, so the account can consistently play in low Diamond league and usually get all the way to Champion III at the very end of the season.
Neal's gold league accounts have level 7 summoners and rares but are otherwise good examples: https://peakmonsters.com/@cattle-egret/collection
Here's one done by Aggroed more standard level 6: https://peakmonsters.com/@glittershine/collection
Champion League
Most champion league accounts are just as many maxed cards as possible. But, perhaps of mostly academic interest, here's an account Neal put together to the specifications of top player @jacekw: https://peakmonsters.com/@great-blue-heron/collection
I wouldn't recommend copying that one unless you think you can get a player as good as he is, though.