The laptop I've been given for work seems like it would fit the bill quite nicely. It's a HP EliteBook 850.
Weight (✓) = 4.15lb
Display (✓) = 15 inch 1080p IPS
Memory (✓) = 16GB @ 1600 MHz
CPU (❌) = Intel Core i5-4210U (dual core, 4 threads)
OS (✓) = Windows 8 (Free upgrade to Windows 10)
Storage (✓) = 256GB SSD
GPU (✓) = Intel HD 4400
Fingerprint reader (✓)
This one comes with separated touchpad keys as well (it even has a little nubbin in the keyboard and separate keys for that, too), and - this is the main feature for me - it has a dock which you can leave connected to a monitor, keyboard, mouse, etc and just plug in to. Honestly, this makes my work life so much easier.
I've been using mine for programming, writing websites and doing general design stuff and it feels really easy to work on - especially with this dock hooking it up to a larger monitor most of the time.
Also, one thing you didn't mention is battery life, but I'd just like to say that this thing will last forever. It'll easily go 6 hours without a charge even with fairly heavy usage.
I'm not sure about the price of this specific model, seeing as it was supplied to me by my workplace, but I've seen results in the $950 to $1,200 range. The dock is sold separately as well and I think they're roughly $160 to $210, depending on where you get them.
Hope this helps :)