Here’s a stun combo I’ve been working on with Ryu.
It works against almost all characters, even yun.
Opponent in corner; almost stunned:
Ryu: Jump in fierce, crouching fierce, ex side kick
: opponent stunned :
Walk back a bit, standing jab, universal overhead, dash in ex shoryuken (both hits hit).
Pretty cool looking and does a lot of dmg.
You can also substitute a roundhouse hurricane kick or dash in crouching fierce in place of the dash in ex shoryuken, which saves meter.
The dash in crouching fierce variation has the hardest timing IMO.