Inglorious
Part of speech: adjective
Definition: Ignominious; disgraceful; not famous; obscure.
Unsung
Part of speech: adjective
Definition: Which has not been lauded or appreciated.Not sung.
Example sentence: The 1986 tax act is sort of the unsung hero of the very good economic times we had for a long time. Of course, politics gums it all up again and preferences get put in.