Perhaps the most inspired arranger was Ronald Binge - who began by working for Mantovani, and apparently invented the sound of massed 'silver strings', with the famous cascading/ overlapping 'waterfall' effect for which this orchestra became so well known:
Binge, as composer, wrote a handful of unsurpassed classics within his genre. As well as lovely tunes - these each have something distinctive about the arrangement.
My favourite must be the sublime Elizabethan Serenade, with its very special repeating flute-dominated phrase from the woodwinds, alternately contrasted with flowing violins, and a repeated choppy rhythm from the lower strings:
Another piece that is famous in Britain is Sailing By (from its use some decades ago by the BBC, when the radio station closed-down each night). This has a gorgeous melody, gorgeously-developed. But what makes it extra-special is the bubbling accompaniment - again, on flutes and woodwind.
Ah, the delicate art of arrangement!