From what you said, if you’re willing to be Alliance, you might be a good fit for Prophecy. We’re a community-focused, social-casual guild on Misha/Rexxar. We raid 2 nights a week (Mon/Wed) from 8:30-10:30pm CST, or 9:30-11:30 EST. We do normal/heroic raiding, and we do mythic dungeons.
We definitely have people who’d love to do achieve runs, rep, mounts, etc. The one thing I’m not sure about is I don’t think many do max level pvp, but we do have a couple who like pvp while leveling, so they may be interested.
We’ve recently had some issues due to the attendance boss, but we keep going on, and are working our way through heroic BoD now. 
Here’s our recruitment post, if you’d like to check it out:
Also, I’ve been leveling a horde character on Thrall. If you want we can chill sometime
Rain#1470 (Bnet)