I am not your typical anime fan; some short of Wester civilisation person with zero respect for the Eastern Asian art and a simple viewer. I am more like an admirer of what they do. Furhtermore, I've finished Shingeki no Kyojin (Attack On Titan; season 1), Death Parade, Deadman Wonderland and I've watched a bunch of episodes from Captain Tsubasa, One Piece, Naruto, Avatar: The Last Airbender, Legend of Korra, while I'm also planning (apart from waiting patiently for the Shingeki no Kyojin season 2) to watch Mirai Nikki (Future Diary), Death Note, One Punch Man and, maybe, re-watch Yu-Gi-Oh! (Abridged)...

Now this is the point where the introduction is violently interrupted to present you my cause; throughout those years I've made a list with anime characters that someone could call "waifu". There are so many examples, but I shall gather them into a chart. The point is, I need to sort out things and, using people's point of view, select at least the top 5 "waifus". The anime/manga order is absolutely random, yet groupped.

Note: Name Order used in English is according to the Western Order.

Mikasa Ackermann (ミカサ・アッカーマン Mikasa Akkāman) Attack on Titan (進撃の巨人 Shingeki no Kyojin)
Sasha Blouse (サシャ・ブラウス Sasha Burausu) Attack on Titan (進撃の巨人 Shingeki no Kyojin)
Petra Ral (ペトラ・ラル Petora Raru) Attack on Titan (進撃の巨人 Shingeki no Kyojin)
Rei Ayanami (綾波 レイ) Neon Genesis Evangelion (新世紀エヴァンゲリオン)
Asuka Langley Soryu (惣流・アスカ・ラングレー) Neon Genesis Evangelion (新世紀エヴァンゲリオン)
Misato Katsuragi (葛城 ミサト) Neon Genesis Evangelion (新世紀エヴァンゲリオン)
Maya Ibuki (伊吹 マヤ) Neon Genesis Evangelion (新世紀エヴァンゲリオン)
Hikari Horaki (洞木 ヒカリ) Neon Genesis Evangelion (新世紀エヴァンゲリオン)
Yui Ikari (碇 ユイ) Neon Genesis Evangelion (新世紀エヴァンゲリオン)
Chiyuki (知幸) Death Parade (デス・パレード)
Castra (カストラ) Death Parade (デス・パレード)
Mai Takada (高田 舞) Death Parade (デス・パレード)
Mayu Arita (有田 マユ) Death Parade (デス・パレード)
Shiro (シロ) Deadman Wonderland (デッドマンワンダーランド)
Makina (マキナ) Deadman Wonderland (デッドマンワンダーランド)
Minatsuki Takami (鷹見 水名月) Deadman Wonderland (デッドマンワンダーランド)
Nami (ナミ) One Piece (ワンピース)
Boa Hancock (ボア・ハンコック) One Piece (ワンピース)
Nefertari Vivi (ネフェルタリ・ビビ) One Piece (ワンピース)
Tashigi (たしぎ) One Piece (ワンピース)
Sakura Haruno (春野 サクラ) Naruto (ナルト)
Hinata Hyuga (日向 ヒナタ) Naruto (ナルト)
Kurenai Yuhi (夕日 紅) Naruto (ナルト)
Ino Yamanaka (山中 いの) Naruto (ナルト)
Rin Nohara (のはら リン) Naruto (ナルト)
Kushina Uzumaki (うずまき クシナ) Naruto (ナルト)
Temari (テマリ) Naruto (ナルト)
Yuno Gasai (我妻 由乃) Future Diary (未来日記 Mirai Nikki)
Minene Uryū (雨流 みねね) Future Diary (未来日記 Mirai Nikki)
Tsubaki Kasugano (春日野 椿) Future Diary (未来日記 Mirai Nikki)
Ai Mikami (美神 愛) Future Diary (未来日記 Mirai Nikki)

Sorry for the long list. Have fun :)