Many of them do accommodate 5 on 3 sleeping surfaces but note that these rooms are often limited availability - make sure you book early and tell the hotel your needs.
B Resort - yes, rooms with king bed and bunk beds (ETA: also some rooms with 2 queens beds or king bed and sleeper sofa)
Best Western Lake Buena Vista - yes, rooms with 2 queen beds and sleeper sofa
DoubleTree Suites - yes, rooms with 2 queen beds and sleeper sofa (these rooms also have a kitchenette)
Hilton Orlando Buena Vista Palace – only suites have sleeping for 5 - 2 queen beds and sleeper sofa
Hilton Orlando Lake Buena Vista – only suites have sleeping for 5 - 2 queen beds and sleeper sofa
Holiday Inn Orlando – Disney Springs Area - unclear, but doesn't seem to sleep more than 4
Wyndham Garden Lake Buena Vista - no