Gold and silver laced wyandottes are the ones with the patchy faces - silvery chicks = silver, yellowy/goldy chicks = gold
Some chipmunks may be welsummer
The greyish chick looking away from the camera in the last pic - top left corner - may be columbian wyandotte (if it looks like no comb whatsoever, that's what it is)
3rd pic middle top (black chevron on top of head) may be ancona - white egg layer, small build, flighty, good at fending for themselves free-range
Having a hard time thinking of any white/buff chickens that fall into "rare breed" - would depend on combs and what color the fuzz actually is on those - they could be buff orps or white rocks (neither rare) or buff rocks, white wyandottes (both rare)...