Stone Boy and Chlorophyll Kid

Two members of the Legion of Substitute-Heroes in the Pre-Crisis era:
Stone Boy (Dag Wentim) and Chlorophyll Kid ( Ral Benem)

Night Girl

 Lydda Jath from the Legion of Substitute Heroes and later on from the Legion of Super-Heroes.

Phantom Girl and Dream Girl

Phantom Girl (Tinya Wazzo) and Dream Girl (Nur Nal) of the Legion of Super-Heroes.

Phantom Girl

Tinya Wazzo alias Phantom Girl/Phase/Apparition

Colossal Boy

Gim Allon alias Colossal Boy of the Legion of Super-Heroes

Saturn Girl

Imra Ardeen alias Saturn Girl of the Legion.

Four versions of the original Legion, two reboot versions and two so called "threeboot" versions. 

Blok

Blok from the Legion of Super-Heroes

Shadow Lass

Tasmia Mallor alias Shadow Lass of the Legion of Super-Heroes

Wildfire

Wildfire alias Drake Burroughs from the Legion of Super-Heroes

Triplicate Girl / Duo Damsel

Trpilicate Girl/Duo Damsel alias Luornu Durgo from the Legion of Super-Heroes

Lightning Lass / Light Lass

Lightning Lass/Light Lass alias Ayla Ranzz from the Legion of Super-Heroes

Insect Queen

Insect Queen, Lana Lang
Left: Silver Age of 1960s
Right: Bronze Age of 1970s [Superboy #205, 1974]

Timber Wolf

Timber Wolf alias Brin Londo of the Legion of Super-Heroes from classical DC era, Reboot Legion and Threeboot Legion.

please click to enlarge

Mon-El

 

Cosmic Boy