Thread: 'kingpin' translation

I'm looking around for the best translation for 'kingpin'. I'm not interested in bowling. The best slang definition I could find online for the version I'd like is this:

http://dictionary.reference.com/browse/kingpin (very bottom of page)

The drug kingpins are well protected.
My uncle is the kingpin in this organization.

Google has a few results, two or three of which seem to translate to kingpin. Could any of these be used in the example sentences above?

http://www.google.com/dictionary?langpa ... gpin&hl=en

ось
кегля, стоящая в середине
шкворень
важное лицо
главная фигура

Thanks for looking!

Наркобароны. Заправилы.

Thanks, wanja! I guess it doesn't translate very well. ;/

Братан