Shuttle's DX30 features the 10W Celeron J3355, M.2 and 2.5" storage options, HDMI, DisplayPort, and a legit CPU cooler. $195
The DL10J is the DX30's successor, featuring the more powerful Celeron J4005 (Gemini Lake). This barebone is also 4K and 4G-ready. $199
Logic Supply's CL200G features the very same CPU used in the Chaco Canyon NUC, and a rugged chassis that doubles as a heat sink. $259