Melee Weapons
Zorflux Blade- Sword When enemies are hit gives them radiation eventually turning them into dust No un-unique version
[censored] Happens- Machete Long and says [censored] HAPPENS on the blade un-unique version Machete
Hit em!- A power fist that says Hit em! across the fist orange un-unique version Punchies
Time and Space- Akimbo power fists Black and Red un-unique version Double powerfist
Rifles
California Long Rifle-High Velocity Sniper with adjustable zoom optics
Finnigans Rifle- Looks like a wood .22 but shoots Finnigans ammo obtained through the quest Finnigans Problem
Pistols
Meteor Pistol Hardest weapon to obtain and weapon that does the most damage no un-unique version
Deadly Sinners-Black Desert Eagle with high power
Heavy Weapons
The Siamese Dragon-Dual Minigun held by one grip very high rate of Fire no un-unique version
Launchers
Limb Launcher- Revolving Launcher that shoots limbs you can get A perk called Mutilation expert which allows you to get ammo from killed enemies
SMGs
MacDaddy-Golden uzi with silencer high rate of fire un-unique version Uzi

Best to use http://www.gamesas.com/index.php?/topic/1221849-fallout-4-speculation-suggestions-and-ideas-32/ thread for ideas.

Welcome to the Forums!
We already have a thread for this, the Lone Ranger already has the link so I won't bother.

You can post your ideas there.

Yeah, let's do.