Below is the full list of resized units (under huge size setting), RoR units also included.

Rule of Thumb:
Cavalry: 30 for tier-3, and 15 for tier 5 / RoR.
Archers: 60 for tier-3 hybrid; 30 for pure archers (with arrow radius effect).
Infantry: 60 for tier-3 defensive infantry; 30 for tier-3 offensive infantry.

If any is missing or needs change, let me know.

RoR foot squire and battle pilgrim -> 60
Questing Knight, Pegasus Knight -> 30
Grail knights, guardian, royal pegasus and hippogryph -> 15

Greatsword -> 60
Demigrypth Knight -> 30
Witch hunter: increased missile penetration and radius.

Dragon guard and dragon crossbow -> 60
Longma Riders -> 30
The rifle on Sky lantern and Junk: increased missile penetration and radius.

Ice Guard, Tzar Guard -> 60
Gryphon Legion -> 30

Mistwalker sentinel, skyhawk, spireguard; Shadow-Warrior -> 60
Silverin Guard, Phoenix Guard, Gate guard -> 60
Swordmaster, Shadow-walker, Sister of Avelorn -> 30
Dragon Princes -> 30
Hef ranged lord and hero: increased missile penetration and radius.

Wildwood ranger and Deepwood scout-> 60
Bladesinger, Waywatcher -> 30
Sister of Thorn ->30
Great Stag Knight -> 15
Wef ranged lord and hero: increased missile penetration and radius.

Shades, Black Guard, Har Ganeth Executioner -> 60
Sister of Slaughter -> 30
Cold-one Knight -> 30
Def ranged lord and hero: increased missile penetration and radius.

ironbreakers, Hammers, Slayers -> 30
Gyros: no size change but improved missile ap and penetration
Dwarf Engineer: increased missile penetration and radius.

Infernal Guard -> 60
Infernal Ironsworn -> 30

Temple Guard -> 60
Horned One Knight -> 30
Skink Priest: increased missile penetration and radius.

Black Orcs -> 30
Slightly buffed boar cav in melee attack.

Depth Guard -> 30
Blood Knight -> 15
Vampire Coast ranged lord and hero: increased missile penetration and radius.

All Chaos Warrior -> 60
All exalted demon -> 30
All chosen and chaos knights -> 30
Aspiring Champion -> 15
Tzeentch Doom Knight -> 15
Khorne Crushers -> 15