god, this will be the 3rd discussion that i praise Japanese incense in. whatever, they're great.
i used to work in an interior design firm and a lot of times we we would select candles in the brands you mentioned in addition to Diptyque, Le Labo, Santa Maria Novella, Costes (love!) etc for our clients. if you have the kind of cash to drop on one of those huge 9x8 inch Cire Trudon candles they are well worth it. we had one in the office and in 15 min our entire 4 room office would be filled with that candle's scent, and after letting it burn for a few hours, we didn't have to light it for an entire week bc the scent lingered that long.
but if you don't have $500 to burn on a candle (burn, candle - haha), another option we would leave with our clients in addition to candles was Japanese incense. as a matter of fact, before you drop $60 on a CDG Incense series candle i urge you to go out and buy a package of Shoyeido "Great Origin" incense. i wear Kyoto daily and this is what CDG was trying to recreate in the first place.
Japanese incense (mainly Shoyeido, i promise i'm not paid to endorse them, ha) are much more "clean" smelling. they have this really great smokiness that smells incredibly natural and sophisticated. if overly sweet Nag Champa is your only reference for incense, then just know these are a huge upgrade.
i think incense are perfect for bachelor pads bc there is a certain practical/functional characteristic to them that separates them from candles. nowadays i feel like scented candles are known exclusively for ambiance through the dim flickering lighting and the aroma they create ... whereas incense (at least for me) have historically been associated with a more cleansing/spiritual well-being frame of mind. they just seem less fussy and less affected which makes them great for the bachelor that strives to be an incredible host, but doesn't want to seem like he's trying too hard.