Goliath Liberator is accessible at CL7. A Ranger 7 has 1 spell of first level (plus perhaps a bonus spell due to high wisdom). I wouldn't exactly call that "messing around with spells".
But if you want to have no spells, you could just multiclass early, before getting any Ranger spells or use WIS as a dump stat. Multiclass into Fighter for feats or into Barbarian (a Goliath's favoured class) for speed, toughness and rage. Ftr4/Rgr3, Ftr2/Brb2/Rgr3 or Brb4/Rgr3 are all entries to Goliath Liberator. Iirc you can still shoot a bow while raging.
Or go for another PrC before Goliath Liberator: Goliath Rgr3/Stoneblessed[dwarf]3/DwarvenFighter2/GoliathLiberatorX is an interesting build but you loose one point of BAB. The same goes for Goliath Rgr2/Stoneblessed[gnome]3/GnomeGiantSlayer(CompleteWarrior)3/GoliathLiberatorX. (A goliath tumbling around a giant like a gnome, hehe)
Other options would be GoliathBrb2/Rgr3/DarkHunter(CompleteWarrior)2/GoliathLiberatorX for a stalker or Rgr3/Ftr2/Order of the Bow Initiate(CompleteWarrior)2/GoliathLiberatorX for more archery goodness.
Definately check out the Cragtop Archer PrC later on for synergies.
And have a look at the alternate class features/racial substitution levels in RoS for Goliaths and Dwarves:
Goliath Barbarian Substitution Levels (RS, p 150): add knowledge: nature to class list
1st level: Mountain Rage (extra size/strength while raging), replaces normal rage
5th level: Fortification (25% chance to prevent crits and such), lose uncanny dodge
8th level: Skin of Stone (x/adamantine damage reduction instead of normal)
Dwarf Fighter Substitution Levels (RS, p 146): d12 hitdice, gain knowledge: dungeoneering
1st level: Axe Focus (+1 attack with axes), lose feat
2nd level: Racial Foes (+2 damage vs orcs, goblins, and giants), lose feat
8th level: Heavy Armor Expertise (+1 AC in heavy armor), lose a feat