The only way to get real uptime is to have dedicated on-site support. Which is to say "someone to yell at" when the system(s) go down. But that type of service is quite expensive indeed (add an extra 0 to what you're currently paying minimum).
For $100 you're going to get shoddy support and some downtime. All you can really do is buy $100 systems with different vendors so that if one vendor is offline you can push the workload to the other two.
But then of course you need to design your infrastructure to move workloads around, and that within itself is a lot of work...
OVH are similarly priced yet have good DDoS protection for free.
Their SLA is 99.9%
https://www.hetzner.de/us/hosting/produktmatrix/rootserver - Hands down my favorite. Very powerful hardware for the price, very professional, good network
https://www.webtropia.com/en/ - extremly cheap, many different offers, good quality, good option if price is very important
https://www.hosteurope.de/en/Server/ - The "Root Servers" they sell are actually VMs. High price but good quality
https://www.strato-hosting.co.uk/server/dedicated/ - Belongs to Deutsche Telekom, big company, I never used their dedicated servers (the VMs are crap though)
http://www.server4you.com/dedicated-server/ - cheap, big company, quality is ok. Other brands are Serverloft, Plusserver, unmetered.com
https://www.1and1.com/server-dedicated-tariff - big company, good network, not that cheap
http://www.euserv.com/en/dedicated-server/index.php - many different offers, good support, good value
https://english.keyweb.de/products/server/dedicated-server/ - never used the dedicated servers, VMs are crap
https://www.ip-projects.de/produkte/premium-rootserver/ - no personal experience
https://contabo.de/?show=server - Small company, good offers, good support
https://www.manitu.de/root-server/ - Small company, very good support
http://www.seflow.net/dedicati/ - ITALY, small company, very cheap, good
https://www.online.net/en/dedicated-server - FRANCE, very big company, very cheap, good network
https://www.digicube.fr/index/comparatif - FRANCE, extremly cheap, network not that good
http://www.kimsufi.com/us/en/ - FRANCE and CANADA, very cheap, good quality, very good dDOS protection. Other brand of OVH is SoyouStart
https://www.leaseweb.com/bare-metal-server/all-servers - NETHERLANDS, very big company, very professional, kind of expensive, DCs in different countries
Otherwise be aware.