I've been partial to the type of songs that have upbeat trumph to them without the "epic" because the epic seems to make them feel more "distant/pretentious" to me rather than personable. I assume you are not translating the words but going after the heft of the music and vocals itself. I'd like to comment that your description is worringly close to how many people think of "fight songs" although I don't think that is quite what you wanted - I assume you wanted a more "spiritual" aspect to the song as well.
End theme to Bakuretsu Tenshi (ripped by Xylomen) - Under the Sky (artist - Cloudica):
[Xylomen] Bakuretsu_Tenshi_-_ED_ Under the Sky(Cloudica).mp3
assertion of spirit song from Bubblegum Crisis: Devil and Angel's Kiss:
(also part of a nice music video originally released on laserdisc)
07._knight_sabers_-_akuma_to_tenshi_no_kisu_[devil's_and_angel's_kiss].mp3
They don't have to all be tough/strong/vicious epic do they? If not, consider how this builds up:
AngelicLayer - Ame Agari.mp3
If you are looking for only instrumentals, then consider the final fantasy black mages (on box) and a number of game soundtracks, among them Grandia II (among which "Granas Saber" is nice).