I have a sloped, inverted-V double bazooka, installed over marine clay, which allows me to boom into Europe from Spain to Slovakia on 100 watts.
The double-bazooka design was first used by the British in their Chain-Home radar system in WW2. It was on the 10 meter band. It let them see German planes coming across the channel.
The bazooka has a signal loss compared to a simple dipole but has far greater bandwidth...many antenna designs trade signal loss for increased bandwidth.
The highest bandwidth antenna I know of is the discone, its bandwidth is amazing. You always see a discone at airport control towers as it can cover the entire aircraft band with a flat swr near 1:1
I once built a rather large discone that had a flat swr from 2 meters down to 11 meters. The neighbors hated the sight of it...lol