Jester's Sans rankings by JesterBones4150 on DeviantArt

Create a Sans AU's Tier List - TierMaker

Create a Sans AU Tier List - TierMaker

Undertale Sans Tier List by KookasaurusRex on DeviantArt

Undertale AU tier list by PK2018 on DeviantArt

Au sans Tier list. Undertale AUs Amino

Sans Undertale AUs Tier List (Community Rankings) - TierMaker

More AU Sprites Source

Undertale AU Fanon: Threat tier list, 735q4e87 Wiki

Sans Aus Redux Tier List Maker by PK2018 on DeviantArt

Former Undertale fan ranks Sans AU's. Ask anything. (Also, just to clarify, I am NOT an AU fan. I used to be, being the reason I know some. (Also also, I did