If a single theme is widely praised around the Internet, that would be a fine answer in the spirit of the question. But I see no problem with questions that ask for the opinion of an expert on where one can get a few really good theme(s) for this specific purpose. An random question of the same kind, which is widely appreciated: superuser.com/questions/221818/… It asks for a few good options, which make use of the fact that other people have already scanned the Internet to the same end.

I highly suspect that, in practice, this question would not have resulted in a long list at all. There are probably only a few really good options; a (short) review of these options by someone with experience in this same problem/issue is what I would expect as a good answer. I have seen tons of similar questions on Superuser that were not only kept open, but received positive feedback and a few decent answers, and were a success to anyone involved, and also to future readers.