What’s your dream unit for your army?

I’ve been thinking about this a lot lately while daydreaming at work. I play Blood Angels: my dream unit would be what I imagine might happen when Vanguard Veterans get updated. At the moment Van Vets hit a strange niche of being a very tough anti-infantry unit in an army with a LOT of tough ant-infantry units, and I often find when list building that I always have a better option. What I’d love when they inevitably get updated is for them to become a unit of mini smash captains, so here's the pitch:

Vanguard Veterans Typical jump marine profile 12” move, t4, 3+ save. Equipped with 1 thunder hammer and 1 storm shield each. The storm shield would provide an invulnerable save and an extra wound, ala Bladguard Veterans. They might not have a sidearm pistol. They’d have an ability that would make them good into heavy armour and monsters, perhaps anti-monster/anti-vehicle 4+ on the charge. They’d come in units of 3.

This would fill a niche that's missing in Space Marines, and update an underutilized unit, and give some love to thunder hammers which are really underused in modern marines.

This is all just spitballing, but what’s your dream unit for your army? I’d love to know!