First, the artist must have those frequencies present in his voice. You see, you can't boost something the isn't there.
Same with the mic which plays a big part in the sound. It's often come from the proximity effect giving emphased bass. Some mic have this effect some barely
After that you need a preamp that doesn't leave out a part of the frequencies and good converters.
Once in the box, yes post processing may be needed. Those voices are often very compressed and sometime you can use a dynamic eq or a multiband compressor to craft the sound a bit more.

I have no doubt the SM7b can produce a sound close to that IF you have a preamp with enough clean power because the sm7b is kind of a low level mic that needs a lot of gain.

Here is an exemple of a well balanced mic that doesn't boost the low frequencies but the artist has it in his natural voice :

Agree with Marco... first and foremost, the VO artist has to have those characteristics as a natural part of their voice; the tone, the "edge", the resonance. There's no mic, mic pre or EQ in the world that will "make you sound" like a professional VO artist if you don't already have that "certain something" to your voice to begin with. Certainly, these famous VO artists are recorded with very nice gear, but only to capture what they already have inherently.

Don Lafontaine - one of the most recorded VO artists in history ( R.I.P.), didn't get the gigs he did because he just "knew certain people" or because he could read a script.
His "In a world..." VO's have become so famous, that this phrase is now an industry term for his voice... which was just so perfect for VO work, especially for movie trailers:

.... others with great voice characteristics for VO's include James Earl Jones ( Darth Vader, "This is CNN"), and uncountable others as a screen actor:

Martin Sheen ( Apocalypse Now, The West Wing):

Keith David ( Platoon, Dead Presidents, Armageddon):

Morgan Freeman ( Shawshank Redemption, Driving Miss Daisy, Seven):

and one of my all time faves, Peter Thomas, who did many of the National Geographic Docs of the 60's, 70's and 80's. As far as I know, he's still doing VO's ( at the age of 91):

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Ted Q=ted%20williams%20voice'" rel="nofollow">(that homeless dude) Williams might be available if talent is needed.

Brien Holcombe, post: 436864, member: 48996 wrote: Ted Q=ted%20williams%20voice'" rel="nofollow">(that homeless dude) Williams might be available if talent is needed.

Not sure he speaks Hindi, though. ;)