Laura, Myra, and Maxine
Maybe I'm the only one but I could never relate to Laura's character. I've always liked Myra and Maxine better, even if the show always tries to make Laura look the best in every situation (except in rare cases).
Laura is simply too... perfect. She's perfect daughter compared to Eddie, the smartest AND the hottest girl in the school. ALL the guys only want Laura. Myra and Maxine are just as attractive as her, but they are largely ignored by everyone and they can only date "losers" like Steve and Waldo (after they are both rejected by Laura, of course!)
Myra and Maxine are often used to make Laura look better. Like the episode where it's revealed that Maxine is a terrible student in contrast to the brilliant Laura, even if Maxine was never portrayed as dumb in any way. Myra is supposed to be smart but they downplay her intelligence to make her look crazy, desperate, and only able to admire Steve. And then there are some lines, like Myra telling Laura "I wish I was as popular and appreciated as you", or Curtis explicitly telling Myra that Laura is prettier than her (?)
In my opinion, Myra and Maxine are just as pretty as Laura, and way more likable. Myra is fun and bubbly, and Maxine is a sweet and loyal friend. Laura is too uptight and stuck-up IMO.
I understand that Laura is the main female lead, but Myra and Maxine deserved better