Bush: 42 at his death. 1772-1814

His birth year isn't canon and he's either a few years or ten years older than Horatio... I went with 'a few'

Maria: 33. 1778-1811 no canon birthdate and she's described as 'not quite young' in 1802

Taras is 28, just beginning her -destiny.

Riddick was 35ish when he started the barge. Between time skips, he's...37? Or so?

C'rizz was...the equivalent of his early 20s when he met the Doctor, late 20s when he died.

Perfection is lives among the dead years old, sits inside your head months.

Ben is in his late 30s, if he's in his early 40s when Little Fuzzy starts