Braeburn. Soarin’, Little Strongheart, Photo Finish, and Pipsqueak make up the rest of my top five, in no particular order, but definitely Braeburn as my top pick.

Garble and his gang.
 
Umad?

Cherry Jubilee. Yeah

Cloudchaser and Flitter.

Crackle.

@Niggoslav
 
Iron Will’s traveling super show…
 
Iron Will as ringmaster, pumping up the crowd in between acts, Trixie does magic tricks, Gilda does stunt flying, Spike plays the piano and Flim and Flam sell barrels of cider.
 
Brilliant!

@Niggoslav_Krawczyk
 
¬_¬
 
EVIL CADENCE DOESN’T COUNT; She’s her own character, and so damn good.

But Chrysalis was in two episodes. :v  
Nyuk nyuk nyuk! 25 AND 26.
 
Trick, they have locomotives. All that’s missing is mass production.
 
I am going to throw down with Iron Will as well, he’s got a lot of decent potential for growth due to basically everything about him. He travels a bunch, he has those seminars, Fluttershy’s reaction may or may not change how he hosts them, he might meet with other one-shots and create a full blown traveling show, he might decide to take an adventure-some vacation, meet up with a runaway Spike, and go all Huck Finn…Tons and tons of possibilities. Trixie has some of this potential, but she’s limited due to how stubbornly prideful her own personality is.

Both of my favorite ponies are one-offs.  
 

Silly all of you!  
That’s not how you spell Braeburn!

Thunderlane. Or any of the one-shot pegasi from Hurricane Flutteshy. They’ve got a fair amount of personality given how little screentime they have.

Not sure.

@Baron_Noir
 
Actually, fuck it. This.

@Itsthinking
 
Like you’re saying, everyone was an idiot in that episode, and I don’t really care about the characters, ai just want to know how they got a car in a medieval society.

Gilda

@MaggieXawesomeness  
(hidden)
 
Well then, Chrysalis!

Cherry Jubilee. Hands downs, bar none.

@Trickquestion  
Even if they had eventually ran the Apple family out of business with fair competition, they probably would have gotten sick of their shenanigans and ran them out of town. Heck, they won a fair competition, and it was only ponies refusing to buy their cider that they had to leave. If they’re willing to sacrifice quality to win a competition, what will they do when they have a monopoly?
 
Plus, if they apparently have done this before, their scam appears to be to scam stupid townsfolk out of their money as fast as they can, then skip town when people hate it. They don’t seem like the types to actually run a farm. Hey, they got some bits.
 
Oh, and Braeburn and Pipsqueak are my personal favorites.

Sorry, Twist had lines in two episodes.

Featherweight deserves his own spin off series

I think the dragon in Dragonshy is a pretty cool guy. Eh breathes smoke and doesn’t afraid of anything. Except for Fluttershy.

Pip and Trixie have each appeared as cameos in one episode. Trixie has also been mentioned. XD

Trixie!
 

Flim and Flam. Let me be clear that while I do not like them because of their underhanded business strategies (though a little slack is given seeing as that episode made everypony an idiot), I am insanely curious as to where they found a car to stick a cider still on top of. Did they build it? Does Equestria have used car dealerships everywhere but Ponyville and Canterlot? So many questions.
 
In terms of pure enjoyment, Iron Will.

I like Featherweight, and Pipsqueak. Probably Featherweight more though.