I hate to say it but a Rhom is probably just as boring as a Wolf. A Wolf must be bought and accepted for what it is. Not active at all but in that case get some sort of cichlid. Can be trained to feed when you want him to though. When I look at my 10 incher (maybe more), I have certain respect for him and his capabilities. HEs like an armoured tank, lying in wait. I know, little dramatic, but I love that thing. Pretty confident he could take a chunk out of me. Certain guys on MFK have already had that experience.
Just my two cents...