Nexus OS by Cisco look to be OK and is used in a lot of data centers
it is different in configuration to the classical Cisco IOS whereby you have to enable features that you what to use, below are the features of a nexus 7K
switch(config)# feature
bfd lisp privilege
bgp lldp ptp
bulkstat msdp rip
cable-management msrp scheduler
cts mvrp scp-server
dhcp netflow sftp-server
dot1x ngoam sla
eigrp ntp ssh
ethernet-link-oam nv tacacs+
evb nxapi telnet
evc ospf tunnel
evmed ospfv3 udld
fabric otv vmtracker
glbp password vn-segment-vlan-based
hsrp pbr vni
imp pim vpc
interface-vlan pim6 vrrp
isis pong vrrpv3
lacp port-security vtp
ldap private-vlan wccp
with some of the bigger switches, you can actually run docker images on them which I think could be quite interesting for distributed monitoring using a Zabbix proxy on the switch will have to look at that another day