Malkaan Feirros
Malkaan Feirros is the current Master of the Forge for the Iron Hands chapter of Space Marines, and, as befitting a chapter of tech-obsessed lunatics, he also acts as an Iron Father (a sort of mix between Captain, Techmarine, and a couple other things). He also represents the first named Iron Hands character (Primarch excepted) to have been provided a model by Games Workshop since...fuck, EVER.
On Tabletop
Malkaan's already a pretty dangerous guy by dint of being a Primaris Space Marine in Gravis Armour, but then come the weapons. Aside the two servo-arms provided by his harness, he also possesses the Gorgon's Fury, a Heavy Bolter that's mounted onto the harness in place of the typical hand-flamer/plasma-cutter combo, an Auspex array, and Wyrmbite, his power axe.