YEs, ESXi 5.5 with virtual hardware version 10 and RHEL 7 would do.
You may follow VMware Compatibility Guide on Red Hat Enterprise Linux 7.x for ESXi. ISE 2.1 works fine with virtual hardware versions 8, 9, 10, and 11 with either RHEL 6 64-bit or RHEL 7 64-bit chosen as the operating system. We do recommend to choose higher VM version and RHEL 7 64-bit, if available.