well...some that i've watched are on your plan list already...
dragon zakura,
GTO,
misaki number one...
and some that aren't there:
seito shokun
hagane no onna
and there is 1 teacher in
LIFE that working really hard to help her students, but it's not the main story of the drama.. :)
and for high school-comedy-many good looking guys drama, i'll say
ouran (but you're watching it already)
and
mei-chan no shitsuji