This was actually super hard to put together for me because there are just so many good songs. There are so many smaller Symphonic Metal bands that I also love, but some of them didn't make it on the list because, well I just love so many songs. That said, I tried not to dominate this list with Within Temptation songs.

1. Within Temptation - Our Farewell
2. Within Temptation - Jillian
3. Within Temptation - Mother Earth
4. Within Temptation - Jane Doe
5. Within Temptation - Ice Queen
6. Within Temptation - Stairway To The Sky
7. Within Temptation - What Have You Done
8. Within Temptation - Middle Of The Night
9. Delain - Generation Me
10. Delain - April Rain
11. Delain - Sleep Walker's Dream
12. Magica - Redemption
13. Xandria - Lioness
14. Epica - Design Your Universe
15. Delain - No Compliance
16. Sirenia - The Other Side
17. Xandira - Now And Forever
18. Xandira - Rose On The Grave Of Love
19. Sirenia - Path To Decay
20. Within Temptation - Caged
21. Sirenia - Sumarian Haze
22. Sirenia - Winterborn 77
23. Nightwish - Over The Hills And Far Away
24. Katra - Tietäjä
25. Therion - Uthark Runa
26. Leaves Eyes - Spirits Masquerade
27. Therion - Kali Yuga III
28. Nightwish - Bye Bye Beautiful
29. Leaves Eyes - Into Your Light
30. Within Temptation - Aquarius
31. Within Temptation - Solemn Hour
32. Within Temptation - See Who I Am
33. Delain - The Gathering
34. Delain - We Are The Others
35. Delain - Danse Macabre
36. Delain - Lights Out
37. Delain - See Me In Shadow
38. Delain - Sucker Punch
39. The Dreamside - Sorrow Bearing Tree
40. Xandria - Only For The Stars In Your Eyes
41. Tarja - Lucid Dreamer
42. Katra - Beast Within
43. GraveShadow - Lycan Lust
44. Witchcraft - Шаг назад
45. Epica - Cry For The Moon
46. Nightwish - End Of All Hope
47. Cinnamun Beloved - Nothing There
48. Theater Of Tragedy - Venus
49. Pythia - Cry Of Our Nation
50. Flowing Tears - The One I Drowned
51. Tarja - Crying Moon
52. Leaves Eyes - Melusine
53. Flowing Tears - Serpent
54. Maden Agen - All Seems Lost
55. Lyriel - Paranoid Circus
56. Imperia - Suicide
57. Therion - Poupée De Cire, Poupée The Son
58. Avantasia - Isle Of Evermore
59. Battlelore - Touch Of Green Touch Of Gold
60. Ayreon - Tunnel Of Light
61. Serenity - Royal Pain
62. Arven - Rainsong
63. Septem Voices - Сказки красок
64. Xandria - Vampire
65. Katara - Vaaratar
66. Nightwish - Lagoon
67. Ancient Bards - Birth Of Evil
68. Nightwish - Slaying The Dreamer
69. Nightwish - Passion And The Opera
70. The Dreamside - Open Your Eyes
71. Haggard - Awakening The Centuries
72. Ancient Bards - Daltor The Dragon Slayer
73. Katra - Viides Kuu
74. Leaves Eyes - Halvdan The Black
75. Xandria - We Are All Murders
76. Sirenia - Blue Colleen
77. Nightwish - Storytime
78. Sirenia - Lost In Life
79. The Dreamside - Forsaken
80. Nightwish - I Want My Tears Back
81. Xandria - Winterhearted
82. Nightwish - Walking On The Air
83. Crimfall - A Hundred Distant Shores
84. Stream Of Passion - Out In The Real World
85. Sonata Arctica - I Have The Right
86. Epica - Trois Vierges
87. Arven - Raise Your Cups
88. Leaves Eyes - Velvet Heart
89. Magica - Don't Wanna Kill
90. Amberian Dawn - Arctica
91. Stream Of Passion - Mirror
92. Epica - Divide And Conquer
93. Stream Of Passion Haunted
94. Sirenia - Cold Caress
95. Tristania - Beyond The Veil
96. Tristania - Down
97. Haggard - The Sleeping Child
98. Tristania - A Sequel Of Decay
99. Diabulus In Musica - St. Michael's Nightmare
100. Angtoria - God Has A Plan For Us All

Some songs that didn't quite make it that I absolutely recommend are; Elysion's Golden Star, Anneke's Somewhere, Crysalys' Angelica, and Kamelot's Under Grey Skies. I'd also Recommend Angtoria's A Child That Walks The Path Of Man.
I didn't mention Amaranthe's Automatic, Anabantha's Nocturna, nor Indica's In Passing because I wasn't sure if they counted but I check them out too.