Here's a listing of some of the games these companies have devloped if you're not familar with their work.
Atlus: Shin Megami Tensei/ Persona Series, Etrian Odyssey
Bioware: Baldur's Gate Series, Neverwinter Nights, Star Wars: Knights of the Old Republic, Jade Empire, Mass Effect
Level 5: Dark Cloud series, Dragon Quest VIII, Jeanne D'Arc, Rogue Galaxy
Monolith Soft: Chrono Trigger*, Chrono Cross*, Xenogears*, Xenosaga series, Baten Kaitos series.
* These were made by former employees while working with Square.
Tri-Ace: Star Ocean series, Valkyrie Profile series, Radiata Stories