Quite a selection you've got there, so let me start explaining what is my top pick and why.

First off, I like coins with not enourmous supply, so that will rule out Verge (not to mention they are not doing anything on deadlines), it will also rule out Sumokoin as it's supply is 88M, and few more, but they are decent by supply they are Spectrecoin and PIVX. So that leaves us with XMR, ZEC and ONION.

They all support TOR, but DeepOnion is only one that just added OBFS4 & MEEK and is about to implement Zero knowledge as per roadmap. With that and by adding DeepSend feature (more details in white paper) it will be a leader by techology implemented.

It is true Monero and Zcash both are already established coins with huge market cap already, while DeepOnion is still undervalued and on the rise.

For me, as an average user entry point for Monero and ZCash (although both are fairly good) is just above my range, but DeepOnion project is among the best projects and it's highly undervalued toe to toe with these 2 giants and I'm pretty sure it's right investment.

I can write even more, but I'll stop for now. Without any further ado and because all of the reasons above, my top pick vote with all details goes to DeepOnion.