Noctua NH-D15 (best cooling)
Cryorig R1 Ultimate: (A little below Noctua but good)
Dark Rock Pro 3: ( Overall good with some overclock potential)
Worth also considering AIO's for the 8700K - 280 or 360 AIO - as an example my 360 AIO keeps my 8700K @4.9GHz at 70 Degress C in Prime95 version 26.6