My fishy thoughts
Tiger barbs get to a substantial size & I suspect they'd be quite interested in shrimp sampling
They really need to be kept in decent sized shoals so as to not harass other fish.
Odessa's can be lovely or they can be terrific gardeners - you likely won't appreciate their pruning attempts as much as they do
Rosy Barbs - these are such brilliant fish when kept in larger groups (at least 10 -12)
(I'd avoid long fin versions of most barbs as they often end up looking quite tattered)
Denisoni - they aren't nicknamed torpedo for nothing - I'd not recommend them for anything under 120cm (& after watching a shoal in a 180 ... stunning fish) & you'll need to be careful of CO2 levels (low to moderate at most); they really do better in larger groups of at least 6-8 rather than the 2 or 3 most people keep, they are quite interactive in a group. If you want to do these fish, I'd setup the tank around them.
A tiger barb only aquarium can also be very interesting as there are many different color forms.
Shrimp thoughts:
definitely get shrimp established before adding in the Barb Horde
settled adult shrimp can be quite ferocious - amanos & tigers mores so than cherries (though if cherries start breeding & you have some decent moss banks for shrimplets to hide in, they may surprise you with their numbers ... OTOH if they aren't out & about in the tank, not so effective as clean up crew)
If you can track down some of
this type, like amanos they seem to be a larger shrimp that doesn't breed in freshwater (though they seem to ship as various species under 1 name, at least one of the species is claimed to be able to breed in freshwater ...) They are great algae eaters & fun to watch.
You can mix most shrimp species, though the various color forms of Cherries will cross & you'll eventually end up with more of a wild type coloring. In a small tank, I'd be concerned about mixing tigers & cherries ... my tigers always win the battles ... it's likely to work while numbers are small & there is sufficient territory.