My favorite bass tune for showing off is probably Purple Lamborghini from Suicide Squad (featuring Skrillex and Rick Ross), but I do enjoy a couple of others mentioned above. The Blinding by Jay Electornica is pretty good. Wow by Beck is up there. Reaching Out by Bassnectar.
The first acoustic bass track of this album is great for checking your bass. It’s also very low but throughout extremely defined and firm. A few further great tracks (e.g. track 4) on this, but track 1 is maybe the most demanding for some setups/rooms…