Not counting use, and granting I've not used a few of them heavily
Also granting that this is likely showing my anti-Chantry bias.. and let it be said I don't actively dislike any of them overall..
1. Varric. My dwarven hetero-lifemate since DA2.
2. Dorian.Not used him much as I'm playing a Necromage myself but as a character I adore him. Funny, entertaining, but some real pathos there.
3.Blackwall - my LI for my first playthru, but overall a strong, beleivably heroic character in a dark setting. Plus dat beard.
4. Iron Bull. Because he's the Iron Bull. What else needs said?
5. Cassandra. We clash often, but she has a lot of character depth and she's got that tough, rugged hotness going for her.
6. Cole. Amusing, but.. ehnot used him much (Because Varric). If I ever get over the "Rogue must be Varric!" thing, he'll get the spot.
7. Sera. Kinda weird.Funny. That hairstyle's awful. Suffering from the same issue as Cole of "not being Varric".
8. Solas. The word "meh" comes to mind. The fade-archeology angle is interesting. He's not bad. He just.. doesn;t stand out.
9. Vivienne. See that bit about "clashing often" re: Cassandra? Apply that times ten here. Likable character overall, and entertaining, but the political differences (IC and OOC) with her stance make it hard to like her currently. The Pro-Chantry playthru may change that.