1. C-17 Globemaster III (transport)
2. C-130 Hercules (transport)
3. KC-135 Stratotanker (tanker)
4. KC-10 Extender (tanker)
5. P-8 Poseidon (maritime patrol/reconnaissance)
6. E-3 Sentry (AWACS)
7. E-8 Joint STARS (reconnaissance)
^ above have ADS-B In capability
This answer on Aviation Stack Exchange did some research into ADS-B statistics for military aircraft: https://aviation.stackexchange.com/questions/107851/military...
TCAS (collision avoidance) can use Mode A/C/S however it depends on if the aircraft has the earlier or later model TCAS: https://aviation.stackexchange.com/questions/90356/does-tcas...