Just seen this thread.
@deewinc I’d argue you to wait a month or two before pulling the trigger. Intel’s 8th gen processors are currently rolling out to ultrabooks.
Laptops using the 7th gen U-series processors (most ultrabooks) will benefit from the extra cores. Dual cores to quad cores is a HUUUUGE improvement. They will not be fanless though.
And since you asked, I recommend the LG Gram 15 (2017 edition). It is not fanless but it is quiet. Amazing hardware, great battery life, very portable. An all-around great laptop.
I am not sure when the LG Gram line will be refreshed but I reckon it will be soon.
In case you need more power (fans on fans here ), go with the XPS 15. The GTX 1050 should come in handy if you play light games, video editing, CAD etc.
If you still need a fanless laptop, here is a detailed list. Most of them are not 15".
You will not find a wide range of 15" fanless laptops. Even Apple does not have a fanless 15-inch laptop, they have a relatively quiet 15-inch laptop.