Wild Cohort is a good idea. You can pick up an Allosaurus (tough), Dire Tortoise (gets a surprise round, period), or Dragonhawk (flies) with it. Depending on your DM, you might be able to take Shared Fury, letting your mount rage with you.
Greenman by Bradakhan/Autumn Greenman by Sgt. Pepper/Winter Greenman by gurgleflep/Spring Greenman by Comissar