Shaolin Kung Fu, along with the Buddhism that Shaolin derives from, was being suppressed a great deal during the Qing Dynasty and things simply got worse and worse for them through the 20th Century. It was already on decline when the CCP took over and smashed Buddhism including the Shaolin Monastery version for the better part of fifty years before bringing it back. Most Shaolin Kung Fu in China is basically performative, including impressive forms demonstrations and acrobatics and body conditioning feats and the like.
There's lots of Buddhist temples though that probably offer similar benefits. Might not be the Shaolin derived form of Buddhism but the mindfulness and body conditioning they engage in can be pretty intense if you follow their routines. Buddhist monks in many cases can practice what they preach... so to speak... when it comes to meditation and benefiting oneself and the like but I'm doubtful you'll be able to find a strong martial tradition in the art anymore, at least that reportedly portrayed by Shaolin monks.
The most competitive sport martial art is probably Sanda/San Shou which is basically the Chinese version of sport kickboxing. There's a fair number of MMA and kickboxer types who have professed training in it. It's origins might be in Wushu but it's been very modernized with effective boxing and kickboxing techniques. I doubt its any better or worse on average then many forms of kickboxing or karate or even Tae Kwon Do being practiced. But yeah, if you want to look up Sanda, the most famous practitioner is probably Cung Le whose fought in Strikeforce and the UFC IIRC. I've been watching a lot of One FC (which is like an Asia-Pacific Version of UFC) and there's a Filipino fighter out of Team Lakay who states 'Wushu' is his fighting style but what he means is 'Sanda' whose pretty legitimate as well. His name is Edward Folayang. But he has a Black Belt in BJJ as well.
The only competitive Kung Fu practitioner I can think of offhand is Sean Obasi, he's an American whose dabbled in mixed martial arts and the like, but he also trains in Brazilian Jiu Jitsu so I mean... there's still a big gap in Kung Fu when it comes to ground fighting. I can't think of anyone using Kung Fu as one of their bases off hand. But some Wing Chun looks pretty good for striking. Boxing is probably more efficient generally speaking but if your unconventional and talented, I'm sure Wing Chun or somesuch could be made to work.
Every so often in kickboxing and the like there's a highly skilled kickboxer who uses Tae Kwon Do as a base technique and it's always cool to see. Maybe there's something similarly possible with Wing Chun.