I do not have access to these insects . For this reason, better imaging resolution is not possible. Confirm this insect genus name also will be helpful for my research .
if you could provide some data about locality of origin of all these beetles, it would made identification much, much easier. I agree with András that second beetle is some Staphylinid - looks like genus Ocypus. The rest (3rd - ...) is indeed from family Carabidae, but I have no idea, which genuses.
What I see for certain is that the first beetle is from family Silphidae, but genus Blitophaga (its valid name is now Aclypea) has much bigger head and different pattern on elytra. This beetle should belong to genus Silpha instead, but I am not sure about the species, because elytra are not clearly visible. If you could provide locality for this one, it would narrow down the posibilities.