Riccardia chamedryfolia would look nice, not technically a moss but you know.
One thing to suggest, you should taper the path so that it gets thinner towards the back of the tank. Creates an illusion of depth.
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Haven't heard of that one but I'll check it out!
Yeah, it will taper more. You get the closest idea of the perspective I'm going for from the dry shot of the hardscape above. I'll finish the taper fully when I add the the final top off of aquasoil before planting. Thanks for the suggestion tho!