Top of the list has to be a Class 28. D5705 is currently being restored at the ELR, not far from Hattons. Heljan have already done the OO version.
I'm sure that Farish will offer updated Peaks & eventually the Crab.
Others include...Unrebuilt Patriot, LNER 2-8-0, BR Standard 75xxx, G2 (although the Union Mills version is pretty good), LMS 4-4-0/Compound.