iPXE setup in mixed environment

[Peterbk]

Digging around for some days now I wasn't able to find a comprehensive setup for what I think is a quite common scenario.

We are in a mixed environment with linux, windows 7 and windows 10.
Hardware is from different vendors like Dell, HP, Lenovo, Raspberry, ..
The DHCP server is a M$ server 2012 provided by our network team.
The PXE boot server currently is a linux machine.
We use syslinux with cmenu with TFTP to boot different install or recovery images (like gparted) and use Ramdisk to install windows from ISOs.

The problem is that new hardware uses EFI boot and I couldn't get syslinux to work with those.
So I found iPXE as a possible alternative.
Alas I cannot find a good tutorial which describes how to migrate our setup to iPXE.
Can someone possibly point me in the right direction?