I'm thinking about a melee Astartes list. Any ideas or is it even possible?
I'm starting with Kill Team, so Vanilla without expansions first.
It has been noted before, but without expansions it will be rough. For melee you have Scouts and Reivers + a tac Sarge with a Fist and a Intercessor Sarge with a Power Sword. Deathwatch veterans offer options for more power weapons. Astartes can use the medic spec, as per errata.
My advise would be
Scout Sarge, Combat Knife, Bolt Pistol (Leader) 11 p.
Tac Sarge, Powerfist, Bolt Pistol (Combat) 17 p.
Reiver Sarge. Combat Knife, Heavy Bolt Pistol (Veteran) 17 p.
Intercessor Sarge, Power Sword (Medic) 18 p.
Thats 63 points, so you are left with 37 to play with. An interecessor with grenade launcher would be useful, as well as a Rocket Launcher or heavy Bolter. Maybe a Sniper Rifle for you Scout Sarge.