I'd like to recommend Rode NT5. It's a fantastic condenser mic that can pick up basically anything, I've tried it for speech, singing, guitar, percussion and more and I haven't found anything that it doesn't suit well for.
It works better at a distance than really close. I wouldn't sing 5 cm (2 inches) away from it, but rather 10-15 cm. If you're interviewing someone it should just be a matter of placing the mic between you since it isn't very directional.
I'm not sure, but I think you can only get them in pairs, which might be a downside if you only need one.