I don't see any recent weapon suggestions besides yours.

(heavy-super-deadly) Redward Bomb. A crystal bomb infused with traces of fiery wood (fire lumber arm)
Elemental with chance of fire -to fit between stun sun shards and shock salt bombs

phearium bomb/phearium destroyer/forbidden phearium destroyer: literally, a shadow BAB - F2P shadow bomb

Silver Conductor/CHarged Silver Conductor/Silver Force Dynamo: A classic (nitronome/DBB)elemental bomb.

copying and pasting the suggestion that I had used previously, with some modifications:

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Brass Knuckles and Boots (the boots maybe only on pure normal damage version, but whatever, keep on all them u_u')

Fast than Calibur/brandish normals strikes (3-strike combo), strong as Triglav/Sudaruska on charged attack (maintaining the slowness of the charged attack), and classified as sword because it is a short range weapon
all of them can cause stun, at different levels
have 3 types of them:

>> The First one is pure normal damage, when the charged attack is: stand still for a while (preparing the stroke), dash 1 square forward, dragging everybody, followed by a nice kick on all enemys in the path (maybe can drag the players too, like rocket hammer)
the charged attack can stun and have moderate chance to causing moderate stun, the last strike too, but is just fair chance to causing moderate stun, start as 2* weapon and have 5* version

>> The Second is mixed elemental/normal damage, more focused on area of effect attacks, the charged attack is stand still for one second and launch 2 punches on the ground, making shockwaves, with area of ​​effect of a master blast bomb (4 stars blast bomb) the 5* version of the weapon (maybe little less AoE), the first one give interruption, the second, knockback and stun effect
only charged attack can stun, have have fair chance to make moderate stun, can't be stopped unless being shocked or dying, as additional effect, can free the user from the frozen status effect (you are smashing the ground nearly you, after all)
start as 3* weapon, variation of the pure normal damage type and have 5* version

>> The Third type and last is mixed piercing/normal damage, more single target oriented, the charged attack is stand still for one second, and after, dash 1 square forward, followed by powerful uppercut, where the range barely can hit more than one target at the same time, interrupts whatever get hitted by charged attack, even invulnerable ones (besides doesn't make any damage, like hit the shield of the trojan or hit the snarbolax)
the charged attack have good chance to causing strong stun, the last strike of the combo have moderate chance to causing moderate stun
start as 3* weapon, variation of the pure normal damage type, like the another and have 5* version

all 3 weapons share the same pattern of normal attacks, except the last swing (the first one [pure normal] is a kick, second [mixed elemental] is a ground punch, the third [mixed piercing] is a direct punch)

don't have shadow version

[i'm bad to try give names, so... i just put the concept]