As a main warden (reputation 4, soon to hit 5) that loves to 1v1, I can confirm it's pretty damn possible. Picture this case:
Your opponent is dumb/slow enough not to dodge your shoulder bash, you hit him/her and do your side attack. Unless you're fighting and assassin, all the other classes in game have stationary guards. Should you attack from the side they were guarding you're asking to get that blocked, with all that means.
With that said, there's a way to increase your chances of successfully hitting those light attacks. Let's say you hit your two side light attacks or a single top light and then follow up with a shoulder bash. In the time it takes for the warden to actually charge at your "inimicus" pay close attention to the last position of his/her guard. That way you know from where you should NOT attack. Should you be insecure about it, your opponent being proficient in blocking or any of you having a bit of lag go for a top light and another shoulder bash. If you're feeling confident you can also go top light into side light, but never dual top as the second side light has almost if not the same speed. If you're feeling more confident, go from the top light into a side heavy or a side heavy faint.
As I stated, it increases your chances of hitting, it doesn't guarantee it. After the shoulder bash your opponent has an almost non existent window of frames to change his guard position and block you. It almost never happens. If it does he/she is either a god of blocking or, most likely, got lucky.
One final tip: Should you shoulder bash your opponent into a wall don't go for light attacks. Do a top heavy. Same logic goes if you guardbreak them and push them into a wall.
Hope this helps

DEUS VULT!!!