Ekko Zaun Disruptor 2g

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Ekko's Parallel Convergence ability creates a single hex zone around his target, then increases the damage of his next three attacks. After the zone ends, it deals magic damage to enemies within, scaling based on how much they took during that window.
As the earliest available Disruptor, Ekko has some inherent utility thanks to the Dazzle effect. If you're in Zaun he's a no brainer, but he may find his way into other comps as well.
Gwen Shadow Isles Disruptor 3g

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Gwen is one of the few Shadow Isles champs, meaning she is locked by default. Her "Snip Snip!" ability causes her to dash around, dealing multiple small hits to enemies within a cone.
As with all Shadow Isles champs, she scales based on Souls, allowing this ability to become more potent over time. Once again, a perfect pair with Disruptor, letting her damage and debuff enemies repeatedly.
Malzahar Void Disruptor 3g

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Malzahar's Void Swarm is the perfect Disruptor ability, summoning two Voidlings that each attack FIFTEEN times. While each hit is small, this obviously makes the most of the trait, and could even become stronger depending on what the Void provides.
Seraphine Piltover Disruptor 4g

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Seraphine is a relatively basic AP caster that can attack multiple enemies separately, and eventually hit a cluster at once. In addition to the damage, Grand Encore also heals allies with her AoE wave, giving her some extra utility on the field. Okay overall, but not outstanding as a 4-cost unit.
Azir Shurima Emperor Disruptor 5g

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Azir is the foundation of Shurima as a whole. He alone is the key to unlocking Nasus, Renekton, and Xerath, making him vital for the trait.
His unique Emperor ability places Sand Soldiers onto the battlefield, preparing another line in combat. While they normally stand idle, they'll lunge out once Azir makes three attacks. When he casts "Arise!", he'll summon another one and they'll all strike again.
Winning and losing is all part of the plan, as you'll have to face every situation to align his allies. It'll take time, so be sure to grab Azir ASAP.
Mel Noxus Disruptor 5g

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Mel's Radiant Eclipse ability grants her a very special passive. As she gains Mana, she'll throw orbs around her targets, dealing damage and draining more Mana in the process. After draining enough, she generates you a random Radiant item!
Assuming she can generate at least 1-2 items in a reasonable time, this is a ton of extra value regardless of the field. Although the active effect is no joke either, as she detonates the orbs to deal massive AoE magic damage.
Unlocking Mel involves having a 2-star Ambessa die (while equipped with an item), meaning it may not be easy. But under the right circumstances, she sure could become a game winner.
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