I'd either go one of two routes depending on whether they have pre-existing conditions.
For an applicant without pre-existing conditions:
STM with United Healthcare's Golden Rule
An applicant with a chronic coandition is typically much better served on a plan with more patient protections AKA ACA otherwise known as the Patient Protection and Affordable Care Act.
Those two I would consider baseline coverages to build upon.
My favorite dental is a DHMO with no max annual benefit, no waiting periods, and no claims to file.
