A few from my years in Africa:
Top 5 scary critters I had inside my house:
adult spitting cobra (Naja nigricollis)
army ants
scorpions
baboon spider (tarantula)
bats (carry rabies)
5 most troublesome critters commonly found in my house:
white ants (termites)-- ate everything. linens, sofa cushions, food supplies, joists.
mosquitos-- carried malaria, got under the mosquito netting, kept me awake
voles-- my cat wouldn't catch them because they smelled (and presumably tasted) bad
cockroaches
ordinary small black ants-- seeking moisture, thousands of them, on the counters near the kitchen sink