Geoff, your remarks only apply to the high Bb instuments: trumpet, cornet, and fluegelhorn. Also, amateur players may not be as good as you think. Written E5 (= e", sounding D5 = d") should be safe though.

Each labiophone ("brass") instrument is a case of individual consideration, whereas the relationship between the various saxes is fairly straightforward.

Knowing the ranges is only the first step towards a satisfactory instrumentation, which is a lifelong struggle. Good books include Henry Mancini's "Sounds and Scores". Carefully listening to good music (of the desired genre and in adjacent styles) and studying the scores is the best training.