fantastic baby, high high, miryo's mini, a variety of miss a, sexy love, lipstick, some tracks off tasty's album. That's off the top of my head but if i was really trying i'd essentially focus on music that is still familiar while showcasing the particulars on kpop. Production that isn't overwhelming or grating, which means more boy groups probably since they're usually lower in pitch, but then again the girl groups have put out a lot of nice tracks recently.

+ the obligatory "you probably wont like this at first but they're the staples and you should experience them early on" list of gee, sorry sorry, etc