Maybe this will help a bit.. quick google search:
“Here is a list of some of the most common guppy tank mates:
Livebearers (mollies, platies, swords)
Gourami Fish
Cory catfish
Rasboras
Most Tetra Fish
Small Species Plecos
Cherry Shrimp
Oto Catfish”
source: https://guppy-fish.com/tank-mates/