VirtualSMC.kext (or FakeSMC.kext) is as aforementioned essential. This kext is what tells macOS "Yes this is a real mac", emulating the functionality of the SMC on real Macs (hence the name). Without it, no Hackintosh.
All the kexts shown here are available for download on the kext repo provided and maintained by Goldfish64. All these kexts are automagically built when a new kext update is commited.
- IntelMausiEthernet.kext - this works with most newer Intel LAN chipsets
- AppleIntelE1000e.kext - this works with older Intel LAN chipsets - but can cause KPs on newer chipsets
- AtherosE2200Ethernet.kext - this works for most Atheros or Killer networking chipsets
- RealtekRTL8111.kext - this works with most gigabit Realtek LAN chipsets
- RealtekRTL8100.kext - for 10/100 Realtek LAN chipsets
- USBInjectAll.kext - best explained by the creator of the kext himself:
In 10.11+ Apple has changed significantly the way the USB drivers work. In the absense of a port injector, the drivers use ACPI to obtain information about which ports are active. Often, this information is wrong. Instead of correcting the DSDT, a port injector can be used (just as Apple did for their own computers) - GenericUSBXHCI.kext - this kext is often needed for USB 3 support, especially on FX.
- WhateverGreen.kext - this kext fixes a lot of GPU related issues.
- Lilu.kext - this kext acts as a loader for other kexts. More specifically it can patch kexts, processes and libraries.
(I myself don't use Bluetooth nor WiFi so I don't have knowledge in that, but here is some information on the subject by CorpNewt. Check Credits for more info)
Apple is pretty minimal with their WiFi support, so I'll only cover the two main chipsets I'm familiar with. I've used a BCM94360CD + PCIe adapter, and BCM94352HMB/BCM94352Z in my Hackintoshes. The BCM94360CD worked OOB with no extras as it's a native card. For the BCM94352 flavors, I've been using AirportBrcmFixup.kext and the companion Lilu.kext for WiFi setup and BrcmBluetoothInjector.kext (on 10.13.6+) or BrcmPatchRAM2.kext alongside BrcmFirmwareData.kext - all of the Brcm* kexts are from RehabMan's OS-X-BrcmPatchRAM repo.
- VoodooHDA.kext - a jack of all trades master of none solution to audio. Required on FX, but has better alternatives on Ryzen.
- If you are on Ryzen and have a supported codec we will be using native audio, this will be setup later on. This has a better quality than VoodooHDA along with other improvements.
- NullCPUPowerManagement.kext - This kext disables CPU power management, as that is not supported on AMD chips.
Depending on what hardware you have in your machine you might need some other kexts. This list is more to be used to give you a general idea, you will probably have to do some google-fu.