Umbreon GX/Zoroark does a good job against Garbodor. Umbreon sits out of Kukui-less K.O range for Drampa, even with a choice band, and has Resistance to Garbodor. Zoroark BREAK can copy Trashalanche and normal Zoroark can hit a fair amount of damage as well. Umbreon can kill two Garbs with Shadow Bullet, Lysandre, and then Shadow Bullet again. Not to mention, Zoroark/Zoroark BREAK is a one prize attacker that can deal a decent amount of damage, and factoring in Resistance, it takes garb 8 Items to OHKO as the BREAK sits at 160HP, which is easy for the deck to play around, not to mention Zoroark BREAK can also copy Beserk, which OHKOs Drampa with Choice Band. Umbreon also can handle Drampa as they exchange two-shots. Here's a list:
Pokemon (20):
3x Umbreon-GX
1x Flareon AOR
4x Eevee
2x Zoroark BREAK
3x Zoroark
3x Zorua
1x Wobbuffet (Strafing into it is a good option)
2x Tapu Lele GX
1x Oranguru
Trainers (31):
4x Sycamore
4x N
1x Brigette
1x Kukui
1x Lillie
2x Lysandre
4x VS Seeker
4x Ultra Ball
1x Super Rod
1x Field Blower
1x Special Charge
4x Choice Band
2x Float Stone
1x Atlar of the Moone or Reverse Valley (Reverse Valley only helps the math against Solgaleo, which could be significant as with Flareon, Choice Band, and Reverse Valley, Shadow Bullet OHKOs, but is useless against most everything else, so I'd opt for Atlar of the Moone Also, I know one Stadium is iffy, but we do have Field Blower.)
Energy (9):
5x Darkness Energy
4x DCE
Also, DeciPlume is WAY more cancerous than Garbodor IMO. Garb doesn't win games by going first and shutting you down.