I have searched the books and the options are limited, especially at lower levels.
(core, those who walk..., Game master's toolkit, gaia 1) (not sure if you can summon undead/animated-corpse (ud)) (same for (machine) constructs (c/mc)) (not counting Spirit undead)
+-105 - (11+ uncontrollable) - 9 (undead) - (+-10 constructs) = ~75 creaturse
avarage level 4.35 & median 5
- level 0: 2 (1ud)
- level 1: 4 (1ud)
- level 2: 3 (1c)
- level 3: 9.2
- level 4: 10.8 (1c, 1ud/c)
- level 5: 8 (1ud, 1ud/c, 1c)
- level 6: 11.6 (1c, 1mc)
- level 7: 12 (1ud, 1c, 1mc, ud/c, 1ud?)
- level 8: 8 (1mc, 1ud/c)
- level 9: 7 (1mc, 1ud/c)
- level 10: 5.4 (1ud)
- level 11: 3 (gnosis?)
- level 12: 2 (1c)(gnosis?)
- level 13: 2 (gnosis?)
- level 14: 1 (c1?/(gnosis?))
- level 15: 2 (gnosis?!)
- level 0: Zombie (ud) / Fiery Salamandere
- level 1: Babelion / Soul Scavenger / Skeleton (ud) / Gnidium Helleborum
- level 2: Ghost, minor / Drone (mc) / Marionette, Lesser (c)
- level 3: Luminary / Shadow / Blatoddea / Cath Flidais / Chichusei / Yinnun / Gwyllgi / Succubus (Daughter of Lilith & -Abrael )
- level 4: Asagiri / Aberration / Animated Armor (c) / Spectral Beast / Stribog / Ghost, major / Hamadryad (8 types) / Child of Baal / Spectral Observer / Ashura Oni, Lesser / Type-005 (ud/c) / Zaqqun
- level 5: Nezuacuatil / Slayer (ud) / Banshee / Hunter (Type-012) (ud/c) / Ignis / Baroque / Marionette, Greater (c) / Medusa / Lesser Oni (2 or more types)
- level 6: Elementals (Sylph / Efreet / Titan / Undine) / Manfeitor / Emeth (c) / Huldra / Technocrat (mc) / Nyx / Manticore / Arctic Chimera / Blood Rose / Shinigami, Lesser Shinigami / Symbiosis (2 sides)
- level 7: Alius / Archchimera / Void Knight (ud) / Cerberus / Sphinx / Ginnungaus / Ginnungaus (gnosis 30) / Humbaba (c) / Nature's Wrath / Carrier, Lesser (mc) / Raziel Archeteypum (Type-100) (ud/c) / Bone Collector / Valkyrie (ud?)
MOST OF THE FOLLOWING CAN NOT BE CONTROLED (gnosis 30+)
- level 8: Abomination / Arhiman / Belphe / Ice Maiden / Carrier, Greater (mc) / Necrogolem (Type-042) (ud/c) / Ashura Oni, Greater / Dementia, Lord of Nightmares
- level 9: Hecatondies (c?) / Al-Djinn / Dullahan / Etrien Gnosos / Ghost, Arcane / Praetorian (mc) / Shadow Master / aziel NK-X ver. 1.0 (Type-666) (ud/c)
- level 10: Lord of the Dead (ud) / Shinigami, Greater Shinigami
ALL OF THE FOLLOWING CAN NOT BE CONTROLED (gnosis 30+)
- level 11: Behemoth / Infernal Duke / The Shadow of Omega (Omega)
- level 12: Sigma Hecatondies (c) / Seeraphim Potestas
ALL OF THE FOLLOWING CAN NOT BE BOUND (gnosis 35+)
- level 13: C'iel Dragon / Gaira Dragon
ALL OF THE FOLLOWING CAN NOT BE SUMMONED WITHOUT CONSENT (gnosis 40+)
- level 14: Infinite Orb
- level 15: Filisnogos / Lucifer (Omega) / the Lord of Infinity (Omega)