The Esper Summoning from Final Fantasy XII is beautiful. Here's Zodiark for the start
It's pretty, though I chuckled a bit since it involves an egg.
Shemhazai is also well pretty. It has a good start, with the red moon and sparkling footsteps.
Only liked the ending.
I like his swinging pitcher.
Exodus is just so gadget-ish! AND LOOK AT THAT FREAKIN' BIG ROCK!!! And he has a cool base-chair-thing.
And talking about base-chair-thing...
This is the best!
Sorry for the ones that isn't put in here. Hey, I've even didn't put Montblanc's esper!