FrogReaver
As long as i get to be the frog
Conjure animals is good for this. It almost doesn't matter what you get, as long as the critter can use the help action to help a PC. Even a hour's ride on horses can be helpful.
I agree conjure animals is a great spell. It's one of the druid's overall best spells. That said I wasn't convinced of it's control functionality and so I left it out of the main list. If a good case can be made for it helping with battlefield control and out of combat as well then I'd gladly move it to the main list.