Stocking 240l tank! How many discus and what tank mates?

Hi everyone.
I will be getting my Eheim vivaline led 240 (240l) in the next few days and I have a few questions.
(Filter= Eheim Ecco pro 300)

I would like to know , when my tank is cycled, how many discus I can fit into my aquarium and What tank mates (and how many) could I put into the tank with the discus?

Thanks in advance for the replies.

Hi there. What are the L x W x H dimensions of your 240 liter tank?

Hello,
Thank you for the reply!
The dimensions are as follows;

L: 47.2 inches (120cm)

H: 15.7 inches (40cm)

W: 19.6 inches (50cm)