What is the most DPR possible at level 1?

My question is fairly straightforward: What is the combination of feats/race/class/etc that gives the most damage per round at level 1? I’d also be interested to see the maximum possible damage, but this is not the criterion for judgment–just a bonus.

I’m looking to create a level 1 character who is only concerned by doing as much damage as possible at level 1. I should note that there is no consideration for any level past 1 (albeit I am interested in your speculations about level progression). I’m also interested in the requirements for such a character (e.g. the minimum ability scores needed, DM approval, etc).

Here are the stipulations/settings that need to be known:

  • All Primary Source Books are available. Basically if it is RAW it is good.
  • No home-brewed rules. Starting amount of gold as per the default amount.
  • No exceptional magic items are available (only the common ones available anywhere).
  • All variants described in the rules are available (e.g. the variant human class).
  • Assume no situation modifications (e.g. terrain, advantage, etc).
  • Only assume modifications if they are *almost always available. This means we are only interested in DPR (Damage per round).
  • Assume no outside buffs from party members or other sources.
  • Any temporary buffs can be used as long as they last for the entire combat (or close to it). Rage, for instance, would count.

My research tells me that a Barbarian is likely the best choice for this offhand, I am wondering if anyone can come up with a better idea.