is it just me or is your list empty?!?!
anyway, as for your request, i guess we have similar tastes ^_^ though i still enjoy love triangles- a main lead getting jealous is the best thing i can ask for ;)
Secret Garden - a must watch. no major love triangle, but still one obssesive jealous main lead guy! and for a bonus, a kickass girl as the main lead!
cunning single lady - very, very,very similar to emergency couple, divorced couple that meet again! though the second lead takes more than 60% still, very similar; and enjoyable!
9 end 2 outs - i dont really remember much about this drama, expect that its one of my favorites!! oh, ans it has a 'shes my girl F*$@ off' type of feel, if i remember correctly!
a gentleman's dignity
city hunter
i have more but im just too lazy to type... so just tell me if you want more ^^