Well then, why don't you yourself use Marriland's Team Builder. I mean, it's not like we can read your mind and know what Pokemon you like and dislike. -_-
Anyways, I'll just throw in my 2 cents or so.
I went with your idea of keeping Samurott, Unfezant and Chandelure. But, may I suggest using Sigilyph? It's more of the offensive side, but if you wish, you can just stick with Gothitelle who is a special defense wall. Galvantul$a is a more appropriate choice over Zebstrika. Even though its slightly slower than the zebra, Compoundeyes gives a lethal Thunder plus its immune to Ground and has a great Sp. Atk(only 3 points higher than Zebstrika's Atk). And it has brilliant type coverage with Bug. I presume you're gonna have a bit of a tough time with the last gym since you don't use Dragon types so Ice-types like Vanilluxe come in chillin' the zone. High Sp. Atk and its ability comes useful in hail, which allows you to abuse Blizzard. It can also learn Flash Cannon to remove Rock.
All the Pokemon can be easily obtained. Vanillite at Cold Storage, so you have ample training time before you reach Opelucid. Joltik at Chargestone Cave (where Tynamo is, but you didn't like it so...) and Sigilyph at the Desert Resort. :3 I don't know whether I listed some that you dislike, but oh well, you asked and so you shall receive. ;;
I'll think about getting them, I can just rotate my team if I need to.
And it's easy to gain experience by knocking out lots of Audino.