Yes some board do not have ME.
This is libre boot compatible list:
Desktops (AMD, Intel, x86)
Gigabyte GA-G41M-ES2L motherboard
Intel D510MO motherboard
ASUS KCMA-D8 motherboard
Servers/workstations (AMD, x86)
ASUS KFSN4-DRE motherboard
ASUS KGPE-D16 motherboard
Laptops (ARM)
ASUS Chromebook C201
Laptops (Intel, x86)
Lenovo ThinkPad X60/X60s
Lenovo ThinkPad X60 Tablet
Lenovo ThinkPad T60 (there are exceptions. see link)
Lenovo ThinkPad X200
Lenovo ThinkPad R400
Lenovo ThinkPad T400
Lenovo ThinkPad T500
Apple MacBook1,1
Apple MacBook2,1
and another good from coreboot are:
Lenovo LENOVO G505S ( this is my favorite )
ASUS F2A85-M
this have some blobs for usd video firmware but are safe and also are amd boards most good one for laptop and desctop.
Aslo i think all old nvidia chipset are good:
like 9400m 320m also.
coreboot can be ported to many more boards. But not posible to i7 and new.
Also we must not forger routers!
TP-LINK-wdr4300 is my best favorite for libre router it is only 50 usd
Make secure Iot gateway with LibreCMC and TP-LINK-wdr4300 - how to
http://www.iot-dev.net/ar1p1.html