User blog comment:VeryUnknownFan/Analysis of the Couples/Two-sided Attractions of Total Drama/@comment-31556666-20140810150059

Subjectively, this would be my list. My four favorites are pretty much the same as your list, but just in a different order.

14: Mike and Zoey (Do I even need to say?)

13: Dave and Sky (Doesn't make them come off as good characters)

12: Anne Maria and Vito (It's a false attraction)

11: Harold and Leshawna (Harold deserves better)

10: Duncan and Gwen (A relationship built around deception, no thanks)

9: Gwen and Trent (People say Mike and Zoey came out of the blue)

8: Duncan and Courtney (Fine in TDI, ruined afterwards)

7: Lindsay and Tyler (Not much focus, usually played for laughs)

6: Sam and Dakota (An okay couple, but only developed by an unnecessary transformation)

5: Courtney and Scott (Amazing for about 8 episodes, ruined by SMS)

4: Jasmine and Shawn (Really great couple, but I felt like too much of their time was spent on their conflict)

3: Izzy and Owen (Shined the best in TDA, and shined so well that it made me forget that Owen let Izzy nearly die in Hook, Line, and Screamer)

2: Geoff and Bridgette (Pretty much all the reasons you said)

1: Alejandro and Heather (I know the problems that you mentioned that I won't deny, but that's why I really love this couple. Their perception of one another changes dramatically every so often. If there's one thing the TDAS finale did right, it was Aleheather).