Cross-Comm Crash Helmet - Official TF2 Wiki

Champ Stamp - Official TF2 Wiki

The Cross-Comm Express

Breach and Bomb - Official TF2 Wiki

Sleuth Suit - Official TF2 Wiki

Cranial Cowl - Official TF2 Wiki

Socked and Loaded - Official TF2 Wiki

Airborne Attire - Official TF2 Wiki

Essential Accessories - Official TF2 Wiki

Tux - Official TF2 Wiki Official Team Fortress Wiki

I really like the look of Sparkplug + Cross-Comm Crash Helmet, I think it gives Soldier a frazzled look. Second misc suggestions? : r/TF2fashionadvice

Compatriot - Official TF2 Wiki

Bottle Cap - Official TF2 Wiki

Hazard Headgear - Official TF2 Wiki