Sarcococca would not survive zone 5/6 or if it did, would never recover good foliage by September, unless protected. There are precious few cultivars of Prunus laurocerasus that can survive zone 5/6 like 'Otto Luyken.' Certainly it's not 'Mount Vernon.' Many of the larger-leaved laurocersus do not even do well here in zone 7 East Coast. So given its hardiness, and the fact that 'Otto Luyken' is the most available and commonly grown evergreen Prunus shrub in the Mid-Atlantic, it's extremely likely this is 'Otto Luyken'.

Thank you! Gorgeous plant. Thinking of adding a few on the north side of our house.

I'm in England, so it's a bit rich for me to take a guess, but going from your photos and your location, I'd go with one of the Canadian Explorer roses called 'John Davis'.. see what you think.. hmf hmf

It looks a bit like a very etiolated Crassula elegans.....although the Osclaria deltoides is a possibility. Regardless of the ID, I'd seriously consider changing the potting media to something specifically formulated for cacti and succulents. The MG soil (especially the moisture control formula) is far too dense and water retentive to make these guys happy.