No, it is not. This is better:
Strength: 15
Agility: 21
Hit points: 60
Skills to attributes: 2
Ironflesh: 5
Power Strike: 5
Shield: 0
Athletics: 6
Riding: 6
Horse Archery: 0
Power Draw: 0
Power Throw: 0
Weapon Master: 7
One Handed: 120
Two Handed: 1
Polearm: 1
Archery: 1
Crossbow: 133
Throwing: 1
This is a good fighter on and off horseback. 6 riding lets you get the Destrier, which is IMO better than a Courser for most things. But if you want the Courser, you have enough Riding for it. Your 24 AGI was wasted because none of your skill stats were 8.
15 str gives you access to the Arabian Cav Sword, which is pretty badass. If you wanted, you could probably re-arrange points and get some Shield in there, and you'd be safe from projectiles. If you're going to be mounted most of the time, I'd get rid of the Ath and get Shield instead. You could even knock a point off of Riding and have 5 riding with a Destrier.
The build I'm going for on my main that you might find interesting is:
21 str
15 agi
5 WM
5 Ath
7 IF
7 PS
5 Riding
100 2h
120 Xbow
My first gen was 7if/7ps and I really liked it. Enough punch to 2-4 shot people. The only trouble is blocking quickly enough against Agility based builds and quick weapons. But on foot I usually fight with my team-mates so it's not so bad. When I'm mounted I'm going to basically be a HX that can wreck stuff with my Morningstar if needed.