I recently bought a couple of heavily discounted gift boxes from Valentte:
https://valentte.com
Initially intended as pressies, but I ended up opening one and using the lemongrass & rosemary reed diffuser in the downstairs loo. OMG! absolutely divine, so now keeping both boxes for myself, and I can recommend this brand. All made with soy wax and natural essential oils. I have to be careful with home fragrance products, as Mr L generally grumbles about them and claims they make him sneeze, but he doesn't object to these.
Also, whilst I'm on the case, I'll give you another recommendation for Compass Candles:
https://compasscandles.co.uk
They are a small scale hobby producer of divinely scented soy candles. Most especially of interest, as well as their signature candles, they also make candles in recycled bottles, so if you have a special champagne bottle from your graduation, wedding or whatever, you can send it off to Sam and he will cut the top off and fill it with a scented wax of your choice and a wooden wick, and return it to you.
When the candle has burned down, you can send back to be refilled. I think they are a lovely idea - they also do them in gin bottles etc. Definitely worth a look - I have an old spiced gin bottle myself, filled with sandalwood wax, and it's absolutely lush! I can light it in the lounge and the whole house is fragranced.
(I believe he is a paramedic in real life, and this is his sideline, which he hopes to make into a thriving business).