User blog comment:Skeith9/Heroic Spirits Speculation/@comment-1458758-20140507043229

Well even in the series there's one or two who could make good Heroic Spirits, like Fion Mac Cumhaill, the high king of Ireland. He'd make a good Lancer, as he's known for having used a poisoned spear to take out a spirit.

Merlin would be an epic Caster, his stories are quite famous, they even made films and series about him more than Arthur.

The individuals who make up the various Alter Egos in CCC could also manifest independantly.

Like Brunhilda would be a pretty fierce Berserker.

Other than that, entities like Adam and Eve, or Ask and Embla of Norse Mythology would be immense servants. The root of human civilisation crystalised in a pair of beings. Fate/School life had a similar one using the Mytochondrial Eve as a servant.