What Would Work?

[GetItSahn]

After relocating half of my neon tetra school to a smaller tank, I now would like to add a separate school of fish to my 29 gallon tank. 
The only requirements are that they get along with my current fish: clown pleco, peppered cory, honey gourami, neon tetra of course, male guppy, cherry shrimp. I don't mind if they're another school of tetra or something off the wall different completely. I was thinking of danios but have read you might need a 4ft tank.
 
Open to all suggestions, thanks for reading

 

[EthanF]

Harlequin rasbora are nice fish

 

[Blondielovesfish]

What are the numbers of the fish you already have? Your tank may already be fully stocked.

 

[GetItSahn]

What are the numbers of the fish you already have? Your tank may already be fully stocked.

I was told that when I had the full school of neons I was fully stocked. I got rid of half so i'm simply replacing the 6 with 6 similar sized fish

 

[Blondielovesfish]

Harlequin rasbora, lambchop rasbora, blue eyed rasbora, rummynose tetra, glowlight tetra, cardinal tetra, head and tail light tetra, penguin tetra, black neon tetra.
There are many options

 

[GetItSahn]

Harlequin rasbora, lambchop rasbora, blue eyed rasbora, rummynose tetra, glowlight tetra, cardinal tetra, head and tail light tetra, penguin tetra, black neon tetra.
There are many options

thanks for the suggestions, I really like the harlequins and the penguins