For my main playthrough (canon kind of feels like inappropriate to me due to there being hundreds of canons for many people, including Bioware's canon):
Female Amell/Leliana (did DR and Leliana is not Divine)
Female Mage Hawke/Anders in a Friendmance (although she had a dalliance with Isabela before that, also became fugitives with Anders in the end. Survived DA:I)
Female Mage Lavellan/Iron Bull
No real pattern here for me that I see in the romances I picked, as admittedly I wanted different kinds of romances for my PCs, and picked based on preference, not plot. Each one also had unrequited feelings for another one of their companions (F!Amell for Morrigan, F!Hawke for Aveline, and F!Lavellan for Dorian, at least until his companion quest).
I also have some other playthroughs I have aside from my main one where I loved the romances in:
Female Warrior Tabris/Warden Alistair -> Male Rogue Hawke/Anders in a Rivalmance (though killed him in the end, and died himself in DA:I) -> Male Mage Adaar/Cassandra
Male Warrior Aeducan/Morrigan (had a child with Felsi as well, did DR and followed Morrigan through the Eluvian) -> Male Mage Hawke/Merril in a Friendmance (slept with Fenris before. Survived DA:I) -> Male Rogue Cadash/Dorian
Bonus ME main romance (since it was brought up a few pages ago): Female Adept Shepard/Kaidan in ME1 (Virmire'd him though), then F!Shep/Thane for ME2 and ME3 (remained faithful even after he died).