Tonari no Kaibutsu-kun and Kimi ni Todoke are some of my fave older(ish) shojo anime (although I must confess that I'm not really into the genre much in general).
A shojo-esque but not thematically shojo anime that I ADORE is Natsume Yuujinchou - it's got soft elements, beautiful art, amazing relationships and character dynamics.
Another I'd recommend that isn't STRICTLY shojo but is another fave is Hyouka! The visuals are AMAZING (as it's a kyoani anime) and it's a lovely one-season anime.