Betta Tank Mates

[damanax]

Ok, I have recently come to own a 200l that I've recently started setting up. This morning I discovered that my betta's tank was leaking and as I can't afford to replace it I've put him in the 200l tank.
 
I was thinking of reducing the number of tanks I had, so it isn't /too/ bad. If I just decide to keep Grima in the 200l, what kind of tankmates could he have? I'm aware that cories tend to be ok but I have gravel and don't want to deal with sand. Tetra are also a problem, they always bully the other fish I put in with them. I'd honesty prefer no livebearers either as I'm kind of sick of owning them.
 
The tank dimensions are 122x38x45

 

[allydawn17]

snails, cherry shrimp, african dwarf frog, white cloud minnows, bristlenose pleco. 

 

[damanax]

Oh yeah, frogs, snails and shrimp are no gos. Can't get them due to QT laws 

 

[ag-au]

Shoal of oto or small cories would fit. I was going to say Kuhli loach but they like sand I believe.

 

[Asteria]

I have a Betta with tetra. And i have zero bullying issues. Buy them in a big enough group and you wont see a problem. 
Other than that, i don't see much else that works with Betta
Livebeares in large numbers will gang up on Betta.
A Plec is possibly the best case senario, though they do make a lot of waste xD