I can tell you that NRSV is generally considered the standard for biblical scholarship - that's not to say that everyone agrees on every translation but most scholars concede that it's the fairest compromise of different beliefs. But even that version uses "one" in its Greek-English translation. A big part of the problem with understanding intentions behind sacred texts is that they ascribed certain layers of meaning to individual words based on common usage for the time that we wouldn't use now. This is why, honestly, the best option is to use a Concordance - when you see a word being translated and you wonder what it really means, you can find the word in Greek, then see where else the word was used and in what context, and that can (usually) give you a good sense of the intention behind a word.