Any ideas on what 'standard' PC fonts would match well with this logo?

I need to create a bunch of Word templates that use 'standard' PC fonts (like...Times, Cambria, etc. etc. that would be found on most PCs.) My non-profit client runs a conference that takes place in different cities every year; the documents are accessed by all the staff members, drafted and printed out just days before the conference starts, using rental and clients' PC computers set up in a hotel room-turned-office. Also, the hired local staff members (who change from year-to-year) sometimes bring their own personal laptops--who knows how old--further reducing the number of lowest common denominator fonts that can be used.

The workshop's logo is attached, below. I think the sans serif font is Interstate light, and the 'th' is Caslon 540 italic.

Up until now, they've been using Verdana (!) as a default bold header, and TImes New Roman as the body copy for documents, because those are the common fonts that all the computers are sure to have.

Are there any other 'lowest common denominator' fonts that would pair well (or better) with this logo? I especially want to find a more elegant-but-commonly-used sans serif--I just don't know the PC font system so well.

For background info, the workshop attracts participants who are politicians, defense ministers, ambassadors, etc etc (= a pretty conservative crowd, so classic fonts, including new classics, are what I'm looking for...)