You should at the least make a stub article for Dattner with a few sentences about who he was, and a few citations to the most important printed material you found about him. If you have time, you could write a more complete biography of a few paragraphs, again with citations to relevant literature. (And likewise for your other suggestions.)

There are many, many interesting people missing from Wikipedia. The only way they ever get added is if those who miss their absence do something about it.

Making a list of “stuff missing from Wikipedia” and hosting it at your own site is much less useful.