Westcott and Hort text?

It's sort of a hard question to answer, as it depends on what you mean by "based on".

If you mean the "as is" Westcott/Hort text, I'm not sure if any well-known translations would fully qualify, with the possible exception of the NWT, but even here many "liberties" in translation can be found, where they don't follow the W/H text. Even the "Revised Version" of 1881 did not use W/H exclusively, but rather was "based on" the KJV but made changes according to both W/H (1881) and Tregelles (1857). However, I have come across some practially unknown translations, done by individuals, that are done strictly from W/H - but no details come to mind at the moment, and I'm sure they would be basically insignificant (i.e. most probably would never have heard of them, let alone be able to find a copy) if they did.

However, the Westcott/Hort text is very similar to the Greek New Testament (UBS & Nestle/Aland) used for most modern versions: I don't have the numbers handy, but there is only a 1-2% difference if memory serves. W/H's text was the "heritage" for the Greek texts used today. So in that sense, most modern versions (the ones that use UBS / N/A) are "based on" Westcott and Hort's text.