Ever tried Urgot with this build?:
Muramana
Frozen Guantlet
Runaan's Hurricane
BoTRK
Guardian Angel
Frozen Heart
Muramana/Guantlet/BOTRK with on-hit effects, Runaans procs all on-hit effects, and Urgot with this build is pretty tanky, especially against physical.. Get up close and personal and start shredding kids.
No armor pen, low magic resist (only GA), short range, but I could see this build being strong against melee AD comps which are pretty common right now. Would not fill the role of ADC, but played as a situational top or mid, I could see this working.