The city mapper app is really good for giving you all the different options available.
Also consider, if you have a bit more money to spare and also can do work emails on your phone, the shared "minicab" services. They are like Uber, but you may or may not share your ride with others. And you pay much less than an Uber.
Two that I recommend looking into (you'll need to go into the app before you get a price) are Viavan and citymapper (only evening commutes).
eg tube costs me £2.50+ and requires 45 mins home and a platform change and no seat. Viavan takes the same time, for £5.90, but it's a comfortable ride and i can get 4g so can leave work 45 mins early and do emails.