I would argue (heh) that the best person to argue with is yourself. That removes the dueling ego aspect of argumentation, since there's only one ego.
If you're not willing and able to correct yourself, in your own mind, then it's unlikely that anyone else will be able to correct you either.
In my relatively long life, I've rarely seen constructive arguing between people. It almost always ends up as a test of will and rhetoric, a vote, or "agree to disagree". You don't actually need to argue with another person. I think it's more useful to read another person's writing and then "argue" with them by yourself, in the privacy of your own home and mind.
Moreover, if you're seeking the truth, why would you bother talking/arguing with "ordinary" people rather than with the top experts in the world? Your family, your friends, your coworkers, or internet randos are not likely to have much more access to and knowledge of the truth than you do, unless you happen to keep very special company.