He made the web as we know it. There were a few other projects that were reaching similar goals and were considered part of the "world wide web" at the time but have been largely forgotten. Gopher was the most popular for a time, and there were a few others that were barely more than research projects. Going by peak deployment numbers, Gemini might now be the second most popular web technology ever (maybe; I haven't seen a credible breakdown or anything, just guessing).
In any case, Tim Berners-Lee made HTTP and HTML, and that combination is the basis for the modern web. So much so that we tend to talk about it as the web.