If we are going to talk about the opening themes, then we must talk about the opening theme of Dragon Ball, Makafushigi Adobencha (translated in English as Mystical Adventure)! Just... listen and enjoy! Or else!
Check out Piccolo's entrance music in Dead Zone at about 2:35. Old-school epic. Here's the track itself. Here's that DBZ Battle Theme from the clip posted.
Battle Point Unlimited ∞ when Trunks goes SSJ before Freeza. The song is one of Kenji Yamamoto's best songs. However, the song is made of three different songs from an album released by the German band Propaganda. Due to plagiarism, Battle Point Unlimited ∞ is officially excluded from all new soundtrack collections and caused several soundtracks to be replaced from video games.
M1307, unofficially known as "The Deadly Cell Games", was played in nearly every fight from the Android saga onward. Why? Because it's awesome.
Hironobu Kageyama being one who has his own section in the Awesome Music department made a large number of hits for Dragon Ball, starting with "Spirit vs Spirit". For those not in the know this was the theme that reflected Gohan's emotions when he fought Cell.
While not epic like most of the songs on this list, the first two ED themes for Dragon Ball Z - Detekoi Tobikiri Zenkai Power!, a sprightly and catchy cheer to encourage Gohan, and We Were Angels, a song of remembrance - are both just so fun and upbeat it's hard to get them out of your head.
Regardless of what you think about the English dub of Dragon Ball Z, Faulconer Productions wrote some pretty epic music for it. Highlights include: Vegeta - Super Saiyan, which usually meant Vegeta was doing something totally awesome, Ginyu Transformation, generally played when a major villain died or during other particularly epic moments, and SSJ3 Power-Up which is a superhero victory tune if ever there was one.
Pretty much everyone's "Power's Up" music is going to be a crowning moment. Even Krillin, who unfortunately didn't get too many moments to shine as the series went on, gets an amazing one.
Also pretty much all of Cell's music, which goes from epic to creepy depending on the mood he's in, especially Perfect Cell Runs and Imperfect Cell Theme. And then there's the epic redoing of Perfect Cell Runs that plays after he comes back from blowing himself up, stronger than ever.note Brought down slightly by the fact that while it's the perfect length to fit from the point Future Trunks is shot to the end of the episode as Cell's return is revealed, the editing team decided to use the standard end-of-episode track instead, and didn't use "Cell Returns" until the beginning of the next episode, where its placement wasn't as dramatically fitting.
One of the numerous American bands utilized in the U.S. releases of the DBZ movies, in this case the first Cooler Movie.
Piccolo's theme sets the tone for pretty much every moment that Piccolo has, whether it be getting ready to go to a fight he's not sure he'll survive, to watching over the world as everything goes to hell. It's serious and determined, yet calm and serene. A perfect match for his character, and one of the most awesome songs in the show.
Shuki Levy's music for the Saban era isn't too bad, definitely more atmospheric than melodic. Check out the early episodes' tracks like "The World's Strongest Team" or "Gohan's Hidden Powers" (it's rumored that Ron Wasserman of Power Rangers fame helped compose and perform this early music, which may explain why they have a Power Rangers vibe). Though officially unreleased, Goku had a very angelic motif that played during both his arrivals in the Saiyan and Namek sagas.
The original Dan Dan Kokoro Hikareteku by Field of View fits the first season's "quest for the dragon balls" premise, but as soon as they start fighting Baby (which, mind you, is when the show actually starts getting good), the rap/rock opening really sums up the epicness of the whole thing.
You could pretty much count the vast majority of Yamamoto's music for the games (as well as Kai) over the years. The overkill on Suspiciously Similar Songs which inevitably got him canned from the franchise may or may not affect this, though.
Problems aside, Dragonball Evolution did have one thing going for it: the director wanted a Japanese singer to do the movie's theme song since it was based off a Japanese property, so who does he get? Ayumi Hamasaki. Whoa. Admittedly, Brian Tyler's score for the whole thing does make it seem a little more epic.
The Chosen Warriors, which plays during the first SSJ3 transformation and the failed attempt for the Super Saiyan God. The successful attempt at summoning it is here.
Freeza's Horrific Power. The track plays when Freeza powers up into his Final Form in the movie Resurrection F, and perfectly fits the scenario give that it's heavy, ominous and just awesome.
As mediocre as the obscure Filipino dub is, its music is nothing to sneeze at (even if the lyrics are kinda cheesy). Such examples include "A World Filled With Love" (a cover of "Romantic Ageru Yo") and their rendition of "Cha La Head Cha La".
With the third trailer for Dragon Ball Super: Broly came the movie's awesome theme: Blizzard. The singer, Daichi Miura, is no stranger to hit songs, since he did the opening theme and the movie theme for Kamen Rider Ex-Aid.