I don't have a specific recommendation for you as there are a multitude of options based on your personal tastes/wants.
Do you want analog, digital or tape?
How long a delay are you looking for?
Analog Delays: Although they're more limited in delay time ranges compared to Digital, their strong-side IMO is in the sound quality. They're not as likely to degrade the tone (especially the delay signals tone) as digital can. They are amazing to dial in nice, full and warm harmonics and for me, the harmonics are what make these my first choice.
Digital Delays: Generally, digital will give you the widest range of delay times. It's also more convenient to dial in exact times/tempos. On the flip side, they do tend to sound more synthetic and can break up awkwardly in certain scenarios. Most affordable and most models to choose from.
Tape Delays: Cream of the crop, but you pay for it. The warmest and fullest! Cons are, they are very expensive, bulky in size and most common to be problematic over time. Nice asset for studios, but not nice to take on the road. Notable that they are typically so warm and full, it may actually be a more "muddied" tone than desired if looking for crystal clear articulation.