The phrase "altogether human" is correct and usable in written English.
It can be used to describe someone or something that embodies the full range of human qualities or characteristics.
Example: "Despite his flaws, he is altogether human, with emotions and vulnerabilities that make him relatable."
Alternatives: "completely human" or "fully human".
168 IN COURT AND KAMPONG habits, that it was difficult to believe that he was altogether human.
David Stinson's approach to technology is altogether human: he learns alongside the children instead of instructing them the traditional way.
After a year of projecting invulnerability at Grand Slam events, Serena Williams looked altogether human today at the French Open.
The passion in a work such as Eonta is not altogether human - it has the impersonal quality of a natural force, untrammelled by conventions of language or style.
It's a widespread way of belonging, a trendy conspiracy aimed at being perhaps delusorily all together, and altogether human, at this moment in time.
Maybe my whole scale of values was gaga and this kook was a real person — not altogether human but struggling to be. . . .
Altogether, these human infections indicate that attenuation for animals does not necessarily mean immunity for humans and that biological safety measures must be followed in each case.
Altogether these human incursions in Gabonese forests for exploitation purposes lead to intensified contacts between humans and wildlife and generate a risk of emergence of zoonotic diseases.
Material Men is altogether more human.
Altogether the human genome contains about 3 billion units of DNA, packaged in the form of 23 chromosomes.
From Britain, Frost has brought John Birt Matthew Macfadyenn), a figure altogether more human than he was to be as the BBC's director general and Tony Blair's blue-sky thinker.
