57 and 421 are definitely top of my list, but depending on what the part is trying to say
my other favourites are:
Audix D6 - good for aiding/abetting a scooped
AKG D5 - finds more bite and tidies up lows as it goes.
MD441 - good for
lead parts when you want grit and definition.
U87Ai - I place this further away than
a dynamic for a softer tone with more room.
Sony F-98 - an off-the-wall oddity that
rounds off edges and gets a great blues tone.
Audix i5 - I've only used this a couple
of times for guitar cab. It has a perkier, less forgiving tone than a 57, which is useful
if this is the 8th rhythm guitar overdub and you still need it to be heard!
Occasionally I double up some of the mic's, but this is to give me options. I'm not a
big fan of mixing two mic's. Sometimes I'll mix a distant U87Ai with a close mic, but
that's about my limit.
An Eagle for an Emperor, A Kestrel for a Knave.