Top 10 Most Important Genres to the Creation of Metal

Yes, after 45 years of metal evolution, you can hear that metal music is a variation of classical music - from Iron Maiden's traditional metal to thrash, to power metal, to death metal. Just pay attention to this detail and you will hear the classical foundations. Give another listen (from this perspective) to the riffs of Master of Puppets and Holy Wars.

In metal you can hear influences from almost all classical composers but most notably Paganini. Other composers: Wagner, Beethoven, Bach, Grieg, Mozart, Chopin, Russian composers, Baroque composers, to name a few.

At first user MT said it,then I saw it in one article that many songs were inspired by this genre.Especially Highway Star by Deep Purple

Yes, this is true. Metal and prog rock have several things in common: classical inspiration, more complex and longer songs, better musicianship (compared to the standard rock music).

Hard rock was important in that it already had the necessary instruments for metal - loud guitars, bass, drums. And amps. But music is stylistically different: instead of blues-based music, in metal you play classical-based music on the same instruments. Deep Purple is the best example because they played both genres on different songs. And even on one song - Smoke On the Water is mostly a hard rock song but the famous riff is a metal riff inspired by Beethoven's 5th.

@zxm RE "But hard rock vocals was important": not very much because hard rock and metal vocals are different - metal vox are operatic (Gillan, Dickinson) as classically inspired music needs operatic vox. Hard rock vox are sexy and sensual because blues is, too (Plant, Coverdale). Voice rasp/distortion (when available) are also different.

Hard rock is mostly based on blues. Metal is mostly based on classical...

But hard rock power chords were important for heavy riffs

Yes, punk influenced thrash metal - from punk came a more aggressive sound and rough, unpolished vocals. But Metallica riffs (and all thrash riffs) are metal riffs and not punk riffs. There's a difference between metal and punk riffs.
Because thrash metal was a very successful crossover I would say that obviously metal and punk go very well together. Same for metal and classical.

Without punk rock, fast metal wouldn't exist.

Yes, hardcore punk influenced thrash: thrash = speed/power metal + hardcore punk. Punk influence resulted mostly in a more aggressive sound and rough vocals. Speed and power metal are also fast but they are not as abrasive as thrash.

Hardcore punk is responsible for all extreme metal genres, adding more aggression, speed and heaviness.

I'll give you an example to see that blues is unwanted in metal. Jeff Hanneman of Slayer said about Pantera that he liked some stuff but Pantera were "too bluesy at times" (meaning, not a good idea). And Hanneman wasn't the only one - American and Canadian metal bands left a major label when Pantera was signed to the same label (mostly thrash bands but not only). If this was such a big problem with Pantera, imagine what metal musicians would say about bands with even more blues (doom, stoner, sludge).

No, there's no blues in metal, except in the doomy Black Sabbath. Early bands like Judas Priest needed to get rid of the blues elements in order to achieve a pure metal sound (without blues). The heavier version of blues rock is called heavy blues rock and not heavy metal. Many people confuse heavy blues rock with heavy metal.

No, not really. Black Sabbath did but this is part of doom metal only and not part of the other metal genres. Deep Purple had some psychedelic rock songs but this didn't become part of their metal songs. Where are the psych. elements in Hard Lovin' Man, Burn or Highway Star? In fact, the early bands had to get rid of psych. elements to achieve a metal sound.

Black Sabbath drew their music psychedelic rock,and also deep purple

Maybe not much influencial at the early stages but newer bands use jazz, mostly in guitar work: prog metal - Dream Theater, technical/prog thrash - Annihilator, Coroner, thrash - Testament, Megadeth, prog power metal - Blind Guardian, Theocracy, technical death metal - Blotted Science, Obscura.
I think jazz goes very well with prog and technical versions of metal subgenres because these 3 are complex and demanding.

I wanna add the mentioned new metal musicians don't use smooth jazz, they use some more technical and "acid" jazz versions that require virtuoso players, especially guitar players.

If you listen closely jazz songs then you could realize many metal songs have same music.I meant same instrumental styles.for example drum beats

The foundation for rock and roll, and thus metal is also heavily influenced by the blues. Sure complex metal instrumentation and soloing is mostly based on classical music, but at the start it was based on the blues. All bands who first played metal music were influenced by the blues in one way or another, don't try to deny it.

Let's just summarize metal music as blues(rock)+classical+hard rock. You may as well add progressive rock as an influence on metal music, but not all metal music was influenced by prog rock.