Here is a list of all the Avatars from Nubia to Korra.

Male Airbender: Nubia
Female Waterbender: Shiya
Male Earthbender: Del
Female Firebender: Yuriko

Male Airbender: Koz
Female Waterbender: Mahina
Male Earthbender: Hiresh
Female Firebender: Umakumuko

Female Airbender: Lio
Male Waterbender: Kuai
Female Earthbender: Aaliyah
Male Firebender: Oshiro

Female Airbender: Sengemo
Male Waterbender: Kami
Female Earthbender: Aria
Male Firebender: Zaru

Male Airbender: Jiao Jie
Female Waterbender: Siara
Male Earthbender: Jinhai
Female Firebender: Atiya

Male Airbender: Dhruv
Female Waterbender: Lana
Male Earthbender: Chaman
Female Firebender: Tesni

Female Airbender: Hariti
Male Waterbender: Tentai
Female Earthbender: Toph
Male Firebender: Xiang

Female Airbender: Mi
Male Waterbender: Hala
Female Earthbender: Jiao Je
Male Firebender: Lee

Male Airbender: Tornar
Female Waterbender: Bing Na Po
Male Earthbender: Guo
Female Firebender: Reki

Male Airbender: Jin
Female Waterbender: Fenri
Male Earthbender: Xolt
Female Firebender: Yumi

Female Airbender: Lia
Male Waterbender: Qua
Female Earthbender: Tayrn
Male Firebender: Koza

Female Airbender: Chen Chi
Male Waterbender: Leke
Female Earthbender: Kashvi
Male Firebender: Kuna

Male Airbender: Jampo
Female Waterbender: Miun
Male Earthbender: Bei Wen
Female Firebender: Atsuko

Male Airbender: Varijia
Female Waterbender: Ululu
Male Earthbender: Feng
Female Firebender: Zai Anna

Female Airbender: Nima
Male Waterbender: Arrluk
Female Earthbender: Renna
Male Firebender: Liu Dan

Female Airbender: Sangmu
Male Waterbender: Mako
Female Earthbender: Iru
Male Firebender: Xiong

Male Airbender: Tao
Female Waterbender: Nilak
Male Earthbender: Ilesh
Female Firebender: Azula

Male Airbender: Dawa
Female Waterbender: Saia
Male Earthbender: Xerxes
Female Firebender: Kasai

Female Airbender: Zulana
Male Waterbender: Sokka
Female Earthbender: Lutari
Male Firebender: Sadako

Female Airbender: Lhamu
Male Waterbender: Tian Ta
Female Earthbender: Ajala
Male Firebender: Xin Lai

Male Airbender: Anil
Female Waterbender: Azome
Male Earthbender: Bhuvana
Female Firebender: Koa

Male Airbender: Yaiba
Female Waterbender: Umikei
Male Earthbender: Maiko
Female Firebender: Sharanya

Female Airbender: Ohate
Male Waterbender: Naku
Female Earthbender: Mi Mun
Male Firebender: Afute

Female Airbender: Pema
Male Waterbender: Kaska
Female Earthbender: Harei
Male Firebender: Enki

Male Airbender: Jian
Female Waterbender: Takara
Male Earthbender: Nimral
Female Firebender: Sorela

Male Airbender: Acklet
Female Waterbender: Iluai
Male Earthbender: Qao-Pian-Zhia-Haocuo
Female Firebender: Chike

Female Airbender: Sonai
Male Waterbender: Yan
Female Earthbender: Baichu
Male Firebender: Jinsen

Female Airbender: Jinorra
Male Waterbender: Kenai
Female Earthbender: Monna
Male Firebender: Daso

Male Airbender: Huan
Female Waterbender: Momieni
Male Earthbender: Hiro
Female Firebender: Mayara

Male Airbender: Xian
Female Waterbender: Morri
Male Earthbender: Gopan
Female Firebender: Chyou

Female Airbender: Bina
Male Waterbender: Akena
Female Earthbender: Hai Yuri
Male Firebender: Kouji

Female Airbender: Eun
Male Waterbender: Alpa
Female Earthbender: Ho Sook
Male Firebender: Xie Zhi

Male Airbender: Komun
Female Waterbender: Abha
Male Earthbender: Teiluc
Female Firebender: Malu

Male Airbender: Nergui
Female Waterbender: Erwin
Male Earthbender: Enlai
Female Firebender: Xia

Female Airbender: Fen
Male Waterbender: Kavi
Female Earthbender: Arya
Male Firebender: Raken

Female Airbender: Mitsuho
Male Waterbender: Harou
Female Earthbender: Kyna
Male Firebender: Ryuu

Male Airbender: Tete
Female Waterbender: Yasha
Male Earthbender: Sung
Female Firebender: Tsuchi

Male Airbender: Rinzen
Female Waterbender: O'lina
Male Earthbender: Yata
Female Firebender: Akane

Female Airbender: Kiwa
Male Waterbender: Peraka
Female Earthbender: Shang Tian
Male Firebender: Chihin

Female Airbender: Ishi
Male Waterbender: Xuan Shui
Female Earthbender: Akin
Male Firebender: Nufuken

Male Airbender: Jinsen
Female Waterbender: Aiyoku
Male Earthbender: Bao Dong
Female Firebender: Yumi

Male Airbender: Tryon
Female Waterbender: Vala
Male Earthbender: Atl
Female Firebender: Kiara

Female Airbender: Yoani
Male Waterbender: Kwan
Female Earthbender: Occhi
Male Firebender: Chen Yuan Wen

Female Airbender: Minaura
Male Waterbender: Talbak
Female Earthbender: Lylid
Male Firebender: Seka

Male Airbender: Atar
Female Waterbender: Nari
Male Earthbender: Basco
Female Firebender: Shan Tae

Male Airbender: Oroos
Female Waterbender: Tausha
Male Earthbender: Weik
Female Firebender: Iyukowa

Female Airbender: Dee
Male Waterbender: Ker Man Ne
Female Earthbender: Iolana
Male Firebender: Oni Fi

Female Airbender: Ambar
Male Waterbender: Kai
Female Earthbender: Hanja
Male Firebender: Yata

Male Airbender: Zachoeje
Female Waterbender: Mullan
Male Earthbender: Eagen
Female Firebender: Lo Mei

Male Airbender: Eisen
Female Waterbender: Mae
Male Earthbender: Dan Di
Female Firebender: Sayo

Female Airbender: Konie
Male Waterbender: Yan
Female Earthbender: Chan May
Male Firebender: Ehasz

Female Airbender: Yangchen
Male Waterbender: Kuruk
Female Earthbender: Kyoshi
Male Firebender: Roku

Male Airbender: Aang
Female Waterbender: Korra

Source of Information:
Number of avatars and their genders are from screenshots and anything that has not been revealed has been replaced with creativity…. So enjoy!