The title pretty much explains what I'm searching for. I'd like to read some stories where Harry actively participates in the war against Voldemort and his Death Eaters. Be it by working with the Ministry, Dumbledore, the Order, or making a faction of his own altogether, I just want to read something following this basic premise that's well written.

Couple of things I wouldn't like, merely for preference's sake.

No Slash
No Abandoned Works (either has to be completed or updated regularly)
Preferably well over 100k words, but it doesn't need to be. I enjoy huge stories most.
Harry-centric.
Intelligent!Harry, Competent!Harry, or Powerful!Harry
Well written of course.
Mature in tone.

I don't much care if he's dark or questionable - like I said, I just want a good war story where Harry is actively involved.

Thanks for the help!