Showa: ...I don't know enough about Showa Riders, so seriously can't comment.

Heisei: SAGA and Zeronos

Sentai: DragonRanger and TyrannoRanger, of course.

Other: Zoro and Usopp (...What?)

Showa: Don't know that many Showa Riders to begin with, and the ones I like have already been made Figuarts.

Heisei: More familiar than Showa, but still all the ones I need have already been made Figuarts.

Sentai: Wow, only two? I guess if I really have to narrow it down, then Magired (or the Magirangers as a whole) and Wolzard Fire.

Showa: a new Black, ZX, J

Hesei: Shotaro and Philip; also Hibiki

Sentai: Gobuster, Dairanger, then Zyuranger

Other: Cowboy Bebop, Samurai Champloo, the rest of the One Piece cast

SHOWA: Tackle and Riderman

HEISEI: Hibiki and Blade

SENTAI: MagiRed and Wolzard Fire

Showa: ZX and Starfish Hitler

Hesei: Blade and Kiva (NORMAL form, not Dark or Emperor)

Sentai: DOGGIE KRUGER!, Zen-Aku

Other: Gatchaman & Sailor Moon.

Showa: Stronger, Tackle

Heisei: Human versions of Shotaro/Phillip

Sentai: Miss America (all of Battle Fever, really) and Big One

Oh man a Wolzard Fire would be awesome!

Showa Riders: ZO, Bio Rider, Robo Rider, ZX
Hesei Riders: Zeronos (Altair, Vega, and Zero forms), Hibiki, Cancer Horoscopes
Sentai: King Ranger, Red Racer, Dragon Ranger, Red Falcon, Mammoth Ranger, Aka red

They've already announced Stronger

Heisei Riders: Kiva, Saga
Sentai: Dekamaster, Wolzard Fire.

Haven't seen any Showa Rider shows so I can't effectily have a want there.