Dolphins really shouldn't have average scholarship.  The idea that they are as smart as humans or even close is an old wives tale.  They aren't.  They're barely as smart as dogs and harder to train.  In fact, the smartest dolphin I've ever seen was half killer whale, and I'm still more impressed when I interact with my Uncle's yellow lab (I paid $400 so my little brother and I could swim and interact with dolphins at Sea Life Park).  Most PC characters don't even have average scholarship, and you're claiming every dolphin does.  That's beyond a little silly.

Knights are 100% mortal.  They are specifically granted power To do the Queens' dirty work.   Wardens are not stupid enough to attack a Fae Knight and incur a Faerie Queen's wrath.  Sponsored magic operates outside wc law when the sponsor is a member of the accords and is powerful enough to challenge the council itself.  If you think you can kill with magic sponsored by a lesser dragon, you'll probably be tasting Warden steel by breakfast.

I'll go with option 3, so can you help me with that please, I dont really trust myself enough to try developing a custom class by myself.

Well first figure out if you want to be entirely reliant on your preparation or if you'd like a little balance on the off chance your GM exploits your obvious weakness (which any good GM will do).  Also what you want your Golem to be able to do.  If he's simply a lab assistant and body guard that is animated by your magic alone, I'd put him at a -2 refresh.  If he is a force to be reckoned with, and can hold his own in a fight without your constant supervision, I'd put him at -3 or higher, depending on what powers you give him. 

Your decisions can also depend on your group.  If your character is constantly surrounded by at least a couple of teammates that can get him out of a tight spot then he can be as specialized as you want him to be.  So I'd do something like:

[-2] Golem Item of Power
[-3] Thaumaturgy
[-2] Refinement

If your character may need to get himself out of a tight spot, you may want to make him a little more well rounded, in which case I'd suggest either

[-3] Golem Item of Power (as more of a spirit protector)
[-3] Thaumaturgy
[-1] Refinement

or

[-2] Golem Item of Power
[-3] Thaumaturgy
[-2] Channeling- Earth

Has to be focused practitioner.  Golem is going to have to cost refresh probably as an item of power, so unless you move him up to fully submerged he can't be a wizard.

I really want to make a Bard of the Autumn Court- half high sidhe changeling that is tasked with safe keeping the remaining power and lore of the conquered autumn court.  Sponsored necromancy and entropy magic.  Focus items a drum and flute.  Performance replaces discipline for control.

The Operative

Template: Pure Mortal

High Concept: Council Operative

Trouble Aspect: You Cannot Make Me Angry

Stunts: On My Toes, Too Fast to Hit, Ears to the Ground, Calm Blue Ocean, Hit a Nerve, Redirected Force, The Weight of Reputation

Skills
Superb: Discipline
Great: Fists, Alertness
Good: Presence, Resources, Endurance
Fair: Contacts, Conviction, Deceit, Weapons
Average: Investigation, Athletics, Might, Rapport, Scholarship

Aspects: Open Palm Technique, I am a Monster, We're Building a Better World, What Do You Think You're Going to Accomplish Here?

I think your revised edition is much better and much closer to how Mal would actually be statted in a Dresdenverse.  I'd stat out Inara if I had the PDF's.  Instead I'll just try to add helpful criticisms based on my knowledge of Firefly.  I'll offer some preemptive suggestions though for statting out Inara.

I've actually been thinking about how Shepard Book and the Operative would make great True Believers in the Dresdenverse.  I wish I had the PDF's because I'd love to create both of them.  In fact, if I ever play the game my first character choice would essentially be a younger version of Shepard Book.