Rather just asking for members' wish-list TVs I think a better approach is to set a budget. Your LN46B530P7NXZA was a really good mid-range TV in its day and with today's improved technology and increase in bang for buck you'll be able to get a better 55" 4K for a very good price. 1080P is almost dead so consider a 4K.
In my case, before blowing up my budget and buying a $2500 65" LG OLED as a replacement for my ailing 10 year old LN52A850 I spent hours and hours comparing 4K TCL, Samsung, VIZIO, and LG LED offerings ranging from $500-$2000 before making my decision. People here love helping each other out - including our new members and we'll do our best, but in the end you'll have set a budget and do some leg work before making a decision. All of those that I've listed I've seen and have at least some well reviewed products in their price ranges. All have decent pictures at the base and many have very good to amazing pictures and features at their high-ends. Give us a budget to work with and size requirements and the folks here will do their best to help.
When you shop compare pictures and features (4K with HDR is a big plus for the HDR feature alone) and decide what you need. As you probably learned from owning a Samsung, the apps (like Netflix, etc) that you start with may never be updated. TCL with ROKU OS are entry level to mid-range TVs but Roku is likely to keep their apps (Netflix, etc) up to date. Since I bought my LG (Web-OS operating system) late last year my TV has been receiving regular app updates, but how long that will last is anybody's guess.