Based on your parts list, I'd recommend getting the Denso or Hyundai branded ignition coil. Denso is the OEM for Hyundai. For spark plug, get the NGK 9723. These are the OE spark plug for Hyundai.
I've had misfiring when I installed it dry and torqued to spec on my Civic 8 gen. No misfiring after anti seize...
Just changed the plugs on mine @ 75k 2 weeks ago. DIY EASY! Installed the NGK Laser Iridium ILKAR7L11 94124 plugs. Old ones screwed right out.
I change spark plugs - I change my plugs every 30,000 miles spend the extra money for NGK.
Only ever buy ngk plugs and learn to read their reference chart then you will always know what plugs you can/can't use for small engines
Personally I gapped my NGK laser iridiums to .024 and I've had no issues what so over, I did however have issues with the OEM spark plugs when I pulled them out to which they were gapped at .054, which OEM spec is technically .034
I swear by NGK
Apart from that, NGK is my go-to brand for everything they make.
Here’s a link that may be of help. Your plugs are quite fouled and even at end of life plugs should not look like that.
Bought these exact plugs recently and had the same problem- tip doesn’t unscrew- had to return them.
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