Yan Lo2 is one of the best leader for master combos in general, as you can set up Reliquaries to make some masters better, so at least I can add following to your list:
Yan Lo2 & Seamus1. Seamus is good independent master by himself, and Yan Lo can support his survivability. I tried this combo before titles, but may be now it would be better to take Seamus as leader, since with Yan Lo2 you can pass upgrades without Chiaki?
Yan Lo2 & Kirai1. Haven't tried it by myself, but played against Yan Lo1 & Asami1. Summoning master with leadership aura is pretty good.
Yan Lo 1/2 & Jack1 can be decent, providing some additional movement to Jack and setting up stagger with Manos. Also Jack2 can benefit from armor1+incorporeal combo with Izamu's upgrade.
And if ever DMH will be allowed with double masters, Nicodem can bring some combos with Molly, McMourning, Seamus and Jack1.