There’s also PEP - personalized employment pass. It’s something in between of pr and ep.
An LTVP/LTVP+ holder who is married to a Singaporean or PR.
An unmarried child (under 21 years old) of a Singaporean or PR, who holds an LTVP.
"https://www.mom.gov.sg/passes-and-permits/letter-of-consent/...