Is it your own parish or the Catholic Church more widely that you feel isn't doing enough humanitarian work? Because the RC Church in general does a huge amount of charitable work, both financial and practical, as well as spiritual. And the funds for Notre Dame are mostly from private donors, not from the Church. I used to live in France and still work there frequently so I keep up to date with the French Church: donations and support for the rebuild have actually been lower amongst practising Catholics than the general population. The French people as a whole see it as a cultural heritage which they are shocked to lose; the practising Catholics are more inclined to see past the building to the congregation as the foundation of the community.
Apart from what others have mentioned about the Eucharist and Marian devotions, there's quite a lot of other things which you might find different in other denominations. Whether or not these bother you is dependent on what you most appreciate in Catholicism. For one, the Catholic Church has a stronger sense of the community as the Body of Christ than many (not all) denominations - the necessity of communion with others as the basis for relationship with Christ, as well as the need for an individual prayer life. Other denominations (e.g. free churches, Pentecostal) often emphasise fellowship and accountability, but not communion.
Also the centrality of the Eucharist, not just in receiving communion, but in Adoration etc. And popular devotions in general - parties for saints' feast days, processions, meditative familiar prayers like the Rosary and novenas. Basically the cultural expressions of Catholicism led by lay people and common in the home.
It may be that your current parish doesn't have a lot of this anyway, not all do, so maybe you wouldn't miss it, but it's all part of Catholicism more widely.
In terms of other denominations, Anglo-Catholic CofE is most similar to RC on the surface but still a very different atmosphere. Also most Anglo-Catholic parishes I know are not particularly concerned with humanitarian work, certainly not as much as the average RC parish. Orthodox is the opposite: less superficial similarity in terms of familiarity of the services but much more in common with RC in terms of fundamental doctrine. You would find the worship quite strange though and, again, they tend not to be the most concerned with social justice issues.
Other churches are mainly reformed churches (there are others, but a bit niche and you probably wouldn't come across them), whose theology would be most different from RC. They vary as to how much they're involved in charitable works.