The thing is, it might be a little tight to have
6 of a school
6 Cories
& 1 dwarf gourami
:clap:
Get a school of 6 and then do a SMALL pleco or 3 otos.
I wouldn't worry about a center with a ten if your doing cories and another school of 6
If it was up to me I'd probably roll with 7 cardinals, a GBR, shrimp & snails.
Don't feel compelled that you have to have a sucker fish or whatever...