What are the 5 best video companies from 1986-1995?

[Jumpin]

In no particular order: Square, Enix, Nintendo, Sega, Rare.

I would have added Microprose to the list if the date went past 1996. In reality, within the genres that Microprose specialized in, KOEI and Maxis were far better than Microprose before 1996 (1996 saw Microprose release Master of Orion 2 and Civilization 2).