I would recommend Sceptile. You have quite a few physical attackers already, and Sceptile is a nice mixed attacker. Try this set:
Sceptile @ Miracle Seed / anything else
- Giga Drain / Leaf Blade / Energy Ball
- Dragon Pulse
- Brick Break / X-Scissor
Sceptile has a nice movepool, so you can replace these moves with a lot of other things as well.
Hope I helped!