[Edi]

I would like to state here that it depends on what you mean by the term.

I can be considered a veteran in terms of Dominions 3 knowledge and insights into parts of the game. I am definitely a veteran mapmaker and have above average knowledge of modding, though not as much practical experience as some of the more prolific modders (e.g. Sombre, Burnsaber, Amos and others).

This often translates into people mistakenly ascribing me veteran status as a Dom3 multiplayer, when I actually have all of one MP game under my belt and would get crushed flat in no time even by people who only have a few games under their belt.

If we're talking strictly MP games, some of the names mentioned above and even posting in this thread are a good start but by no means an exhaustive list.