Poor cherry barbs
get such a bad rap because they are lumped together with other barbs (primarily tiger barbs, I think, but maybe all the others). Absolutely everything I have found written describing cherry barbs
specifically indicates that they are not at all aggressive or nippy, that they in fact enjoy the company of other species of fish and are not that fond of their own species, and that they are best kept alone (1 cherry barb) or in pairs. I only have two males and they are juveniles that have always been together, so my actual experience with this fish is limited, BUT, I have read a lot about them and I know they are not like other barbs.
My two males sometimes swim together, sometimes not, and they are very comfortable in my community tank with dwarf gouramis, black skirt tetras, cory cats, and 1 male kribensis. I would classify them as somewhat shy, not aggressive in the least, and pretty to watch. They weren't as hardy as I thought (two others died early on), but they're doing fine in my tank now.
In a tank that size, I would imagine you could have two to three pairs of cherry barbs, or even 3 to 5 males without a problem, depending of course on how many of the other fishes you want. The males probably wouldn't shoal, but they would be happy if they could easily ignore eachother. Lots of plants and territory markers would make everyone happy, especially the kribs, and they particularly like
caves
) Now I see that you also had golden barbs on your list and maybe people meant them and not the cherry barbs are fiesty (or maybe they meant both). I know absolutely nothing about golden barbs.
Btw, my dwarf gouramis have never been at all aggressive with my other fish, nor have my black skirt tetras (but they chase each other like crazy). My krib was added last and will not be a permanent member of this community, but he has fit in well, also.
Is there a particular raspbora you had in mind?