Based on your spend, you may find Capital One's Venture X to be worthwhile. 100k C1 points after 10k spend over 6 months. Earns at least 2x points on everything, so you'll earn at least 120k with your MSR between the SUB and your spend. They also tend to be finicky and so you might have better approval odds since you have fewer recent cards.
Also, if you like URs, you can consider CSP or CSR if it has been more than 48 months since your last bonus. You should PC your current CSR first to a Freedom, wait 4 business days, then app for either the CSP or CSR. You could also MDD and get both the CSP and CSR. Consider P2 doing the same. Make sure to make use of the 20k support link you could generate for the other player.
Amex Delta might be a good option- I just don't personally know much about it.
Alternatively, you could try to nail down specifically where in Europe you would like to travel to and use awardhacker to help you narrow down some routes. Awardhacker will also give you an idea if for those routes you should be looking to earn MR, UR, C1 miles or something else. Hope that makes sense.
Feel free to ask more questions if it's helpful.