A switch for the switches

A newbie question :

8 x 10Gbps SFP+ switches , which switch should I use to collect in star topology these optical fiber connections ?
( CRS317-1G-16S+RM , CRS326-24S+2Q+RM )
Could I consider a router like CCR2004-1G-12S+2XS with bridged SFP+ to add a router/firewall feature to ISP connection ?

Is this a homework question?
If not, then please detail the business requirements and traffic flow requirements.

Not homework but it could be…
A customer ask me for connecting their sfp+ capable switches (mix of various brand, Aruba, Mikrotik, HP, Netgear)
Now they are connected via copper 1Gbps links
Also two servers are connected @ 1Gbps and planning to install SFP+ NICs
As I’m not the maintainer of PC-Server-Nas environment , I don’t know the actual traffic flow/rate,
Server are mostly used as shared folders container.

This looks to me as a nice, low cost aggregation switch as you already stated in your first post.

https://mikrotik.com/product/crs317_1g_16s_rm

I plan to use it in our new office. Instead of multiple copper lines to each workspace i will simply drop fiber and put CRS310 on each table.