Your request is a bit vague, but I'll humor you by copying my post from a similar thread!
After ForeverIntense and epic, just like you asked for.
Later
Blind GuardianWhile more well-known for their straight-up speed/power metal of the early-to-mid 90s, Blind Guardian know their way around an orchestra.
Dark MoorQuality power metal with unique female vocals.
EdenbridgeOne of the great standouts in the symphonic metal world.
EpicaYou probably know about these guys already. Big, bombastic,and epic.
KamelotSee above.
Leaves' EyesFor your ethereal and moody symphonic metal with a Celtic touch needs.
StratovariusThese guys pretty much founded the genre.
WildpathThese guys used to be awesome. You'll see why when you click.
Within TemptationI'm a huge fan of these guys, and when they want to make an intense, epic song, they deliver in spades.
Age of ArtemisThese guys do the whole "symphonic power metal" thing with a bit of a proggy flair.
Amberian DawnMore in the vein of symphonic pop-gothic metal, but they do some great stuff.
Ancient BardsPretty much Rhapsody of Fire with a female vocalist. And 10x the bombast.
AngraSee Age of Artemis above. Same guy's responsible for both.
AnsoticcASymphonic gothic metal with thick, heavy guitars and thick, heavy symphonics. Love this album.
AvantasiaWhen Avantasia wants to be big and epic, they're goddamn fucking big and epic. Holy shit.
Dawn of DestinyOh man, these guys know how to make a goddamn intense, goddamn catchy tune. Fantastic female vocals.
DelainPoppy gothic metal with some great orchestrations. One of my favorites in the pop-gothic metal genre.
Diabulus in MusicaSimilar to AnsoticcA, but not
quite as thick. Still freaking awesome for fans of the genre.
DragonlandAnother titan of the genre, these guys can craft an intense and complex song like no one else.
DreamtaleNot much to say. It's Euro-power metal, it's got symphonic elements, and it's awesome.
ExcalionSee above.
HolyHellApparently their record's crackin' down, because few of their songs are available, but still, pretty epic symphonic metal with some great female vocals.
KeldianA very solid power metal act, but this song in particular is exactly the sort of thing you ordered.
KrypteriaThese guys are highly inconsistent. When they do good, it's really good, and this is one of those times!
NightwishI'm going to just assume you've crossed paths already, so here's a reminder.
Orphaned LandA bit different from the usual, but I figured you'd appreciate it, anyway.
ReinXeedThese guys are often too light for even me, but when they hit home (like here), I can't resist for even a second.
SerenitySolid Euro-power metal, great symphonics, one hell of an album.
SunriseThis is the only song I dig from the album, but you may enjoy the others. This is a fucking phenomenal track, though.
The Slow DeathNot symphonic, but shut up and listen.
TheocracyThese guys don't always add symphonic elements to their songs, but when they do, HOLY SHIT.
Timeless MiracleA heavy contender for my favorite album of all time. Fantastic stuff.
Virgin BlackDark, heavy, bleak, and symphonic, too!
XandriaBig, bombastic, heavy, and highly operatic. Perfect for your request.