READ THIS: i cant imagine a Silent Hill game without bosses, but then again if u look at Silent Hill 4, the memorable bosses in that game were only the wall creature boss and walter sullivan. but the other ones were more like mini-bosses, richard braintree and some other dude in the prison level. The bosses in the first silent hill were awesome. Silent hill 2 has the overall best boss, Pyramid Head. Silent Hill 3 bosses were awesome 2. silent hill origins were cool too. and Homecoming bosses were astounding, expecially, Scarlet and Amnion. so yea, that my opinion on silent hil bosses.
There could be boss battles, but maybe they have to be done a certain way that doesn't involve combat. Such as turning faucets to set off poisonous gas, or luring them into something that kills them. I think it could work. I can't imagine a Silent Hill game without bosses.