If you have a Male Pokémon with the ability Cute Charm lead your party, it will increase your chances of battling a Female. I personally use Sylveon because it has Cute Charm as its regular ability, and it learns Skill Swap at level 25 to check the Pokémon ability.
Other stuff I need that you might have, these are the fossils I'm missing that you didn't list as not having:
Omanyte - Weak Armor
Shieldon - Soundproof
Tirtouga - Swift Swim
Tyrunt - Sturdy
Now I've gone through your needs list, to start these are the Pokémon I don't have and can't get:
Starmie - Analytic (Not my version)
Houndoom - Unnerve (Not my version)
Hippowdon - Sand Force (Transfer Only)
Conkeldurr - Iron Fist (No idea)
Here are the Horde only Pokémon I have yet to catch, do note that I am currently working on catching these, I just don't have them yet:
Arbok - Unnerve
Lickitung - Cloud Nine
Scyther - Steadfast
Jynx - Dry Skin
Tauros - Sheer Force
Sudowoodo - Rattled
Miltank - Sap Sipper
Heatmor - White Smoke
Some will be easier than others.
Everything else I have and will be breeding. Do note that Furfrou doesn't actually have a Hidden Ability, I will still be sending you one. I will breed everything for you first, then I will get back to work hunting Horde Pokémon.
Let me clarify, you don't care about the gender of the Pokémon you receive? You don't care what part of the evolutionary chain they are? You just want the Hidden Abilities, correct?
The gender you send me is unimportant, for the Starters and Fossils as I can't get them in Luxury Balls. I only care about Females if you can get it in a Luxury Ball for breeding purposes.