This is the ranking:
1. Nancy. Obviously the hottest, and also possibly the smartest. Also has the best career of any of them, so she can provide for you. Only downside is she might cheat on you, but since I'm not a dweeb like Dale that's less likely and I wouldn't be so oblivious. Plus if she puts up with Dale, she's got to have the patience of a saint.
2. Peggy. Good steady option. She has a lot of quirks like big feet, an inflated opinion of herself, her tendency to get weirdly obsessed with things, but overall she's the most dedicated wife, even if she's somewhat of a bitch.
3. Minh. Basically Asian Peggy, except seemingly more abrasive. She seems like a faithful, dedicated wife, but also like she'd be awful to put up with sometimes. She's also very spiteful, a trait Peggy doesn't really show.
4. Luanne. She's dumb as a rock and has poor career prospects. Sure, she's good looking, and the youngest, but those are literally the only upsides.
5. Lenore. Everything I've seen from her limited appearances makes her seem like a horrible human being. Wouldn't touch with a 10 foot pole.
There you have it.