No.
It's either 1 single specimin or no less than 6.
if you choose to go with 1 and put tank mates in with it, you'll likely never see the thing.
If you go with 6 you'll get a shoal in the tank and see them on a consistent basis, with maybe one being the odd fish out hiding a lot.
In that tank, you could fit 8 or 9 tops. I would go with 6 or 7 along with a school of maybe 12-20 rummynose tetra and 8-12 cory cats.
I would not add the bolivian ram until after the discus had grown into adulthood, as bolivians can get territorial and WILL bully fish much larger than them - thus making the competition for food that much more intense.