Aquatic and citrus fragrances really are the safest choice for the office, I agree. But you don't need to spend a lot - cheap clones (those from Mercadona or Continente like Avon Anew) work fine if you want something fresh without a strong punch. The real trick is the application: one spray in the air and you walk through the mist, or a dab on your wrist. Two or three sprays is overkill even for someone who loves perfume.
Personally I'd say test it first if you can, because what's subtle to some people sounds way too weak to others. Some I really like are the type L'Oreal Men Expert or even Gillette Fusion (yeah, from the razor brand, but the scent is clean). They easily last till the end of the day. If you want something a bit more long-lasting, eau de toilette tends to be more stable than body sprays, which evaporate quick.