Hello,
We're developing a security focused computer product and hoping to use coreboot. Is it possible to use with modern Intel laptop processors and if so which families or platforms?
Easiest way to find out is to look thru the src/soc/intel/ directory in the codebase: https://review.coreboot.org/cgit/coreboot.git/tree/src/soc/intel
Upstream Intel reference boards are in https://review.coreboot.org/cgit/coreboot.git/tree/src/mainboard/intel. There are many other mainboard targets (laptops and otherwise) that use them under src/mainboard/.
This said, please be advised that support for Intel platforms is not fully open source; only parts of it are open. You can certainly do better than most using coreboot on Intel platforms, however if fully open source code is important in your security model then you will not find it in the Intel (or AMD) ecosystem right now.