CR 5–10 fiend creatures from Monster Labs. These public stat blocks fit that band of the table; remix the CR or abilities if your party is ahead of the curve.
Balam
CR 10 · Fiend
Decarabia, the Star
CR 10 · Fiend
Devouring Slugfish
CR 10 · Fiend
The Devil's Deadeye
CR 10 · Fiend
The Asshole Absolute
CR 10 · Fiend
Godhunter Demon
CR 10 · Fiend
Flesh Flayer
CR 10 · Fiend
Igoronak
CR 10 · Fiend
Embodiment of Misery
CR 10 · Fiend
Demônio do Abismo
CR 10 · Fiend
Clivar the Obliterator
CR 10 · Fiend
Baron of Hell
CR 10 · Fiend
Sin of Odio
CR 10 · Fiend
Malice
CR 10 · Fiend
Beast of Enclair
CR 10 · Fiend
Bandaged Demon
CR 10 · Fiend
Lilith the Corruptor
CR 10 · Fiend
Seven-Winged Demon
CR 10 · Fiend
Astaroth the Fallen
CR 10 · Fiend
Rakshasa of the Twin Pupil
CR 10 · Fiend
Glutus the Cartomancer
CR 10 · Fiend
Alastor
CR 10 · Fiend