When you say "quality beyond reproach" are you talking about the quality of materials used in the composition, or do you just mean longevity and projectionâ€”because that can be (and is more likely) to be accomplished with synthetic and chemical fixatives rather than "good" materials. (To a large extent, quality and longevity are two different things.)
For fantastic scents that use interesting and rare materials, I'd look to indie houses: Sonoma Scent, Slumberhouse, Matriarch, Aftelier etc.
If you just want loudness, look at something like Bond, Kilian, Tom Ford, Mugler etc. The quality won't be the same, and the price will be at least doubled, but you'll be able to evacuate a building if you douse yourself enough. (A good example of how volume / quality aren't synonymous might be found in something like Joop!)
As for hot weather, are you thinking "fresh, citrus"? If so, longevity and projection will be problematic no matter what you do as those types of scents are built around top notes and simply won't last. You can find ways to compromise with the fresh aesthetic (Slumberhouse's Grev will keep you chilled for 12+ hours, for example, whereas something like Tom Ford's Neroli Portofino will be gone within a couple). Is there a reason why you can only wear certain scents in hot weather?