While I had planned to build a Standard Abzan Knights deck for Guilds of Ravnica metagame, I decided to just check on the results from the most recent Competitive Standard League last October 1st and behold, I have found a decklist. It was piloted by the username u_mad_bro and finished in one of the 5-0 records.

Here below is the list:

Creatures
4 Conclave Cavalier
3 Dauntless Bodyguard
4 Knight of Autumn
4 Knight of Grace
4 Knight of Malice
4 Pelt Collector

Instant/Sorcery
3 Flower // Flourish
3 Assassin’s Trophy
2 Assure // Assemble
1 Status // Statue

Other Spells
4 History of Benalia
2 Ajani, Adversary of Tyrants

Lands
3 Forest
4 Isolated Chapel
4 Overgrown Tomb
4 Plains
1 Sunpetal Grove
4 Temple Garden
2 Woodland Cemetery

Sideboard
1 Assassin’s Trophy
3 Duress
2 Find // Finality
3 Lyra Dawnbringer
2 Seal Away
1 Shalai, Voice of Plenty
2 Vivien Reid

Source: https://magic.wizards.com/en/articles/archive/mtgo-standings/competitive-standard-constructed-league-2018-10-01