sun catfish

I have a 30 gallon tank with some danios and a sun catfish. I was wondering if it was okay to put some Kribensises in with them.

I have been looking at Oscar fish for a while now and though I never really thought I would like them, they are starting to sound a lot more appealing the more I read. I have been thinking of setting up a tank for one and adding a couple other large fish to go with it that would be more or less...