Samurott
~Swords Dance
~Aqua Jet
~Return
~X-Scissor
Since your going for a physical 'Rott, use Swords Dance. Aqua Jet is nice because it's priority and Samurott is pretty slow. Return for some nice neutral coverage and X-Scissor for coverage, especially against Grass-types.
Hydreigon
~Dark Pulse / Crunch
~Dragon Pulse
~Surf
~Flamethrower
Your choice on whether you want to go fully-Special or mixed. If fully-Special, go with Dark Pulse for STAB, as with Dragon Pulse, and Surf + Flamethrower for nice coverage. Alternatively you can go with Crunch > Dark Pulse, hence going mixed; if so, Work Up is an option over Surf.
Galvantula and Chandelure are fine.
I'm not too sure about Espeon so someone can do it, but iirc Wish got changed so the amount of HP recovered is based on the users HP, and since Espeon's HP isn't spectacular, Wish might not be a good option. Having said that, I know little about Espeon and hence don't know what to use > Wish, although HP [Fighting] will get nice coverage alongside Shadow Ball, and also hit Dark-types which would otherwise wall her.
Braviary
~Brave Bird
~Superpower
~Rock Slide
~Return / Crush Claw
First of all, give it the Sheer Force ability as this will boost the power of Rock Slide and Crush Claw. Brave Bird for STAB, Superpower to hit Rock- and Steel-types, Rock Slide for Sheer Force boost and for some nice coverage, and the last move for some STAB and neutral coverage. Yay.