This was the first group of enemies that the sailor senshi encountered, and they are a hold-over from the days of the Silver Millenium. They are most featured in the first season of the anime, and the first three volumes of the manga. These villians were also the ones featured in the Live Action episodes.

Queens:
Queen Metallia
Queen Beryl
Kuroki Mio/Queen Mio ^[4]

Shittenou:
Jadeite/Jedite (Jay Daite)
Nephrite/Neflite
Zoisite
Kunzite/Malachite

Neo-Shittenou ^[3]:
Hematite
Kalunite
Hiddenite

Other:
Evil Endymion
Dark Mercury ^[4]

Notes:
[1.] This character was manga only
[2.] This character was anime only
[3.] This character was musicals only
[4.] This character was PGSM only
[5.] This character was video game only