There are two ways you can go: a) a mixer that is also an interface, or b) an interface that is also a mixer. Either way will work.
The former is currently a hot product category, with lots of new - and surprisingly inexpensive - products appearing weekly.
The latter approach, on the other hand, takes up less space and may be less expensive.
My personal preference (and it is largely a personal decision) is to NOT have a mixer, and let my converter serve that function. That just works best for me (much to my surprise, I might add - I've had at least one mixer since 1967)
For mic-only, check out the MOTU 8pre. As the name suggests, it has 8 preamps. Ought to fill the bill nicely for drums, no mixer required. If you have about a grand to spend, there's the fancier 896HD. Never used one myself, but I know a lot of guys on this forum do. (My own unit is a MOTU 828 MkII, but that's not the one you want - only 2 mic inputs, there rest are TRS and digital)