Here are my personal favorites:
ASTRO Moonbin & Sanha - Bad Idea
At first I like their chill b-side All I Wanna Do a bit better than Bad Idea, but they wear crop tops and such for performances of this and I keep watching on repeat. I prefer Sanha's voice (in all of ASTRO actually), but have you all seen Moonbin? Keywords for this particular performance below: arms, crop top, leather straps.
Taemin - Black Rose
I like Black Rose (and Waiting For) better than Criminal. This choreo is awesome. Watch out for the "I'll see you in my dream" move.
SuperM - Tiger Inside
As far as the 3 title tracks for their album go, for me Tiger Inside > One >>>>> 100. Dinner's ready, yeah!
SOLE - Mm Mm
The MV is so low budget, even this simple live version is better. I just found out that she appeared on K-Pop Star and The Voice Korea years ago and in those shows she sang in a diva-like belting style, very different from the R&B she writes and sings now.
VERIVERY - Thunder
The cinematic MV drew some comparisons to Stranger Things, but this performance where they sing live almost completely without a back track while doing a tough choreo really impressed me. Looking forward to what they will offer in their upcoming comeback.
WOODZ - Love Me Harder
This June release grew on me a lot. I appreciate how he seems to always sing live on music shows.
N.Flying - Oh Really.
Another June release but I discovered it late. This one's super fun.
Source: SBS KPOP 1, 2, SHINee, SMTOWN, GOLDEN BROTHER, KBS Kpop, FNCEnt