For color I'd look at gold/red sevs - yes they're cichlids but for the most part and compared to other ciclids they're not all that aggressive.
For Eels look at either the peacock eel or the zig zag eel.
Clown loaches are very popular and do well with a mix of other type fish, they're slow growers and provide the comic relief of the tank.
Have you checked out a Black Ghost Knife yet? They're pretty cool, wish I had one.
And as others have mentioned bichirs are another fan favorite.
For Eels look at either the peacock eel or the zig zag eel.
Clown loaches are very popular and do well with a mix of other type fish, they're slow growers and provide the comic relief of the tank.
Have you checked out a Black Ghost Knife yet? They're pretty cool, wish I had one.
And as others have mentioned bichirs are another fan favorite.