The following cabinets are designed to be freestanding, as well as go flush against a corner wall, so they can also sit side-by-side, with no gap.
157 Bristol
211 Linear
300/301 (if you remove the towel bars) Copper Cove
305 Chicago
388 / 389 Columbia / Mercer island
506 Victoria (married tops)
620 Portland
850 Metropolitan
860 Sonoma
868 Tiburon