As I answered to another similar question, I guess the mixture hexane-ethyl acetate (8:2) is a good option to start analyzing your crude extract.

the solvents are based on the compounds which we are going to isolate, based on this the solvents varies.

we have to increase the polarity of the solvent from low polar to high polar . For example (Petroleum ether extract- Petroleum ether and Ethyl acetate (9:1, 8:2,7:3.. For Chloroform extract- Chloroform and methanol(9:1, 8:2,7:3..)). Similarly we can run the methanolic extract also in the range of increasing the polarity from low polar to high polar.

For petroleum ether extract, you can use hexane:ethyl acetate (8:2) or toluene : ethyl acetate (8:2). For chloroform extract, you can use Chloroform: methanol combinations and for methanolic extract, ethyl acetate: formic acid: acetic acid: water (40: 1:1:0.5) and Chloroform: glacial acetic acid : methanol: water (16:8:3:2) and Butanol: acetic acid:water (4:1:3) can be tried.

These are only some of the solvent systems which have proven useful in many studies. For more details, you can refer:

Wagner and Bladt, Plant Drug Analysis: A thin layer chromatography atlas, 2nd edition, Springer Verlag, Berlin Heidelburg, 1996.

This is the ultimate solution to all your problems concerning TLC.

Regards